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1Back to top Go down   [solved]Valve clearances Empty [solved]Valve clearances on Sun Jan 27, 2019 9:29 am

tinyspuds

tinyspuds
Silver member
Silver member
Morning all,

Bike 1985 K100RT 57k miles

Last week the engine shut down at 60 mph with no prior warning.  I was able to re-start after a few minutes but the temp gauge rose to 3/4 and the fan cut in. It has re-started several times since and run stationary at tickover until properly warmed up without issue.

I have plenty of oil - oil and filter changed 800 miles ago. Coolant is circulating, thermostat is operating, fan cuts in where it should.

Compression test with WOT showed around 100 psi on all 4.

I've taken the valve cover off and there is no obvious physical damage. I've measured valve clearances and found:

All exhaust are .25 - .30 tick v.g.

Inlets:

.15 .10+ .10+ .10+

(my gauges only have .05 increment so 2 thru 4 are an easy .10 but won't take .15).

To narrow it down the 3 suspect inlets are a nice sliding fit for .005 in.

Three questions:

Do these clearances make any sense at all? What I've read says tightening exhaust pretty common, inlet: pretty rare.

If they do make sense, as opposed to me just not knowing what I'm doing, is this likely to have caused the stop and overheat (even though it re-started fine after just a few moments)?

If I have measured correctly, is this a don't ride it til fixed scenario?

I have already had a lot of much needed support on this under a different thread for which I am grateful. However, the bike I normally work on is a 1954 Enfield Bullet, so absolutely not too proud to receive more input.

Thanks, Stu.



Last edited by tinyspuds on Sun Jan 27, 2019 3:34 pm; edited 1 time in total (Reason for editing : Imperial gap added)

    

2Back to top Go down   [solved]Valve clearances Empty Hall SENSOR on Sun Jan 27, 2019 11:35 am

moriarti

moriarti
active member
active member
Twisted Evil now then  fellow Nutter.Unless you heard nice some loud nasty noises,from the top/end then the most likely 
problem is HALL SENSOR Sad ,MY 1984 K100RS ALSO 57K HAD THE SAME SIGNS /SYMPTOMS ,fitted S/H unit problem solved,At this mileage unit is most likely,original and ready to die affraid HOPE THIS HELPS  study



@tinyspuds wrote:Morning all,

Bike 1985 K100RT 57k miles

Last week the engine shut down at 60 mph with no prior warning.  I was able to re-start after a few minutes but the temp gauge rose to 3/4 and the fan cut in. It has re-started several times since and run stationary at tickover until properly warmed up without issue.

I have plenty of oil - oil and filter changed 800 miles ago. Coolant is circulating, thermostat is operating, fan cuts in where it should.

Compression test with WOT showed around 100 psi on all 4.

I've taken the valve cover off and there is no obvious physical damage. I've measured valve clearances and found:

All exhaust are .25 - .30 tick v.g.

Inlets:

.15 .10+ .10+ .10+

(my gauges only have .05 increment so 2 thru 4 are an easy .10 but won't take .15).

Three questions:

Do these clearances make any sense at all? What I've read says tightening exhaust pretty common, inlet: pretty rare.

If they do make sense, as opposed to me just not knowing what I'm doing, is this likely to have caused the stop and overheat (even though it re-started fine after just a few moments)?

If I have measured correctly, is this a don't ride it til fixed scenario?

I have already had a lot of much needed support on this under a different thread for which I am grateful. However, the bike I normally work on is a 1954 Enfield Bullet, so absolutely not too proud to receive more input.

Thanks, Stu.

    

3Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Sun Jan 27, 2019 12:08 pm

tinyspuds

tinyspuds
Silver member
Silver member
Cheers Moriati,
Ordered a used one from motorworks yesterday  Very Happy hoping that will do the trick. Now just gearing myself up mentally for the shim challenge, although hoping someone can give some pointers on why they might be as they are as it seems a bit unusual.
Bike is being prepped for the Dragon, 11 days to go, 4 days til parts arrive, 66 years too late learning about this cr..
Stu

    

4Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Sun Jan 27, 2019 4:10 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Mechanic's tune up...tight inlets and loose exhausts. Tight exhausts would be a worry but yours are fine. I would carry on to the Dragon!!


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

5Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Sun Jan 27, 2019 5:37 pm

tinyspuds

tinyspuds
Silver member
Silver member
Thanks Olaf, You’ve given me a rational explanation for what I secretly knew I was going to do [solved]Valve clearances 212902. All fascinating stuff tho, and I’ll get on the case next month. Never to old to learn.
Got some low risk jobs I can take care of while the chair is off plus install my new HES when it arrives. All doable in the time available.
Cheers, Stu

    

6Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Sun Jan 27, 2019 8:18 pm

RicK G

RicK G
VIP
VIP
@92KK 84WW Olaf wrote:Mechanic's tune up...tight inlets and loose exhausts. Tight exhausts would be a worry but yours are fine. I would carry on to the Dragon!!
Spot on that is usually the way I will set mine up. To be honest I would be looking at replacing the connector to the tank they are very problematic, I now replace these as a matter of course as I have had so much trouble with them in the past.


__________________________________________________
"Every normal man must be tempted, at times, to spit upon his hands, hoist the black flag, and begin slitting throats."  from Mencken's 1919 Prejudices

Bikes 1993 K1100 LT, 1998 K1100 LT, 1993 K75 RT, 1996 K75RT, 1986 K75 GS, 1979 Z1300 Kawasaki X 2 for now
    

7Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Sun Jan 27, 2019 8:24 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
You do have to keep checking more often though. don't forget that.


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

8Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Jan 28, 2019 5:30 pm

moriarti

moriarti
active member
active member
tinyspuds UTUBE K100 VALVE CLEARANCE BY CHRIS HARRIS AND MICHAELOVITCH CHEEKY WAY TO CHANGE SHIMS.ENJOY wrote:Cheers Moriati,
Ordered a used one from motorworks yesterday  Very Happy hoping that will do the trick. Now just gearing myself up mentally for the shim challenge, although hoping someone can give some pointers on why they might be as they are as it seems a bit unusual.
Bike is being prepped for the Dragon, 11 days to go, 4 days til parts arrive, 66 years too late learning about this cr..
Stu

    

9Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Jan 28, 2019 5:32 pm

moriarti

moriarti
active member
active member
tinyspuds UTUBE K100 VALVE CLEARANCE BY CHRIS HARRIS AND MICHAELOVITCH CHEEKY WAY TO CHANGE SHIMS.ENJOY wrote:Cheers Moriati,
Ordered a used one from motorworks yesterday  Very Happy hoping that will do the trick. Now just gearing myself up mentally for the shim challenge, although hoping someone can give some pointers on why they might be as they are as it seems a bit unusual.
Bike is being prepped for the Dragon, 11 days to go, 4 days til parts arrive, 66 years too late learning about this cr..
Stu


__________________________________________________
1984 k100 rs red/black VIN  0004449
    

10Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 11, 2019 2:53 pm

tinyspuds

tinyspuds
Silver member
Silver member
Thanks everyone. New HES got me 660 mile round trip to the Dragon. Couldn’t have done it without you. Love this forum.
Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

11Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 11, 2019 7:42 pm

Dai

Dai
Life time member
Life time member
Bet you got muddier than I did Razz


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

12Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 3:39 pm

tinyspuds

tinyspuds
Silver member
Silver member
Dai, Retired early and in good order as befits my great age 😴. 
Beast was starting thready tickover and backfire on way home with deathly top end rattle this morning. Anticipate starting a new thread soon, but heart not in it today. Funny chaps these K’s.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

13Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 3:50 pm

Matthew-Brisbane

Matthew-Brisbane
Gold member
Gold member
What is this Dragon ? 
That you UK guys talk about

    

14Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 4:39 pm

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
Dodgy tickover and backfiring and 'rattle' can come from a bad injector......


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

15Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 5:19 pm

tinyspuds

tinyspuds
Silver member
Silver member
Matthew-Brisbane search facebook for: dragon rally (concentration moto pays de galles).
Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

16Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 5:24 pm

tinyspuds

tinyspuds
Silver member
Silver member
Olaf,
Funnily enough I did wonder whether or not re-fuelling 5 or 6 times exclusively at motorways in the rain may have introduced something into the system. When you have time to explain what is it with the injectors that would cause a rattle? I’m a lot more comfortable with monobloc amal...
Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

17Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 5:50 pm

Dai

Dai
Life time member
Life time member
Matt - it's a motorcycle rally up in the Snowdonia area of North Wales and has been held every second weekend in February since 1962. The weather is usually sh!t and most times there's a huge helping of mud to go with it. It was originally started as a British 'answer' to the Elefanttreffen in Bavaria which is held at the end of January each year.

This year was my thirtieth Dragon Rally. When I first started doing it back in the 1980s it was still a 'survival'-type rally. With no money, it was always touch-and-go whether we'd make the 520-mile round trip on whatever piece of two-wheel scrap we happened to be riding at the time. Warmth was always an optional extra at night, but the consumption of vast quantities of alcohol was a requirement. The rally site moves year-on-year. This was this year's campsite and one that we've been to many times:

https://www.google.co.uk/maps/@53.0946411,-3.8873329,260m/data=!3m1!1e3?hl=en

The satellite photograph was taken about ten days ago. Just 'south-east' of the centre of the area there's a couple of big grey mounds. It's a few tons of gravel that was laid and failed to keep the mud at bay for people walking into the marquee. To the north-east of the area you can see a small stream running under the track. We were camped literally just south of the stream on the righthand side of the road. I'm sure Stuart can pick out where he ended up after we'd chatted briefly.

As motorcycles and camping equipment have all improved over the years, it's no longer the survival struggle it has been in long-past years. Despite that, it can still bite you back if you don't take reasonable care. The wind speed this year hit 50-55mph in the early hours of Saturday and Sunday morning, which didn't do a lot of tents a lot of good.

Google 'dragon rally' and you'll pick up quite a few stories.


__________________________________________________
'83 K100 upgraded to K100RS spec
Others...
'78 Moto Guzzi 850-T3, '79 Moto Guzzi 850-T3 California,'93 Moto Guzzi 1100ie California,
'03 Suzuki Blandit GSF600SK3 (NFS any more because wifey has claimed it)
    

18Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Tue Feb 12, 2019 11:05 pm

tinyspuds

tinyspuds
Silver member
Silver member
Matt,
I kept getting ‘marshalled’ down the main track as they needed to take the pressure off the entrance traffic. Got pretty much to the end of the hard stuff before declining to venture into the soft stuff. Squeezed the outfit in between the portaloos and a giant skip. Ended up quite cosy with my big yellow steel wind break and en suite facilities. Sunday morning was perfect sat in the tent porch, music on, hot porridge and much brewing of tea. When I finally struck the tent I ended up packing the chair in a 15 minute hail storm and nowhere to hide. Agree with Dai, not just about modern bikes but also modern riding kit. I had 300 miles to home and wet gear at the start would have been absolutely miserable 30 odd years ago. Also had a 30 odd year old K which got me there without having to get a spanner out. Happy days.
Stu


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

19Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 25, 2019 8:30 am

tinyspuds

tinyspuds
Silver member
Silver member
Thanks all and Olaf in particular,
Had injectors ultra sonicked. They were all a bit under spec flow-wise and a bit unbalanced. All returned to spec by Injectortune and re-fitted. The top end sounding like a bag of rocks in a tumble dryer appears to be sorted, although given that the issues found were only a bit off spec I am surprised that the bike sounds so much better. Road testing will tell. Closed for now and thanks again.
Stu.


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

20Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 25, 2019 8:42 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@tinyspuds wrote:Thanks all and Olaf in particular,
Had injectors ultra sonicked. They were all a bit under spec flow-wise and a bit unbalanced. All returned to spec by Injectortune and re-fitted. The top end sounding like a bag of rocks in a tumble dryer appears to be sorted, although given that the issues found were only a bit off spec I am surprised that the bike sounds so much better. Road testing will tell. Closed for now and thanks again.
Stu.

You asked about the diagnosis, I have not had a petrol car in almost 40 years, lpg then diesel. On diesels a bad injector or two can really have the car engine all over the place, wrong fuel amount and wrong timing of fuel can mean either overfuel or no fuel on one cylinder and produce a fairly noticeable diesel knock. Put 4 of them in like that and you're all over the place. Petrol engines will of course do the same and to be fair the K engine design means its a lot easier to eliminate that one before going at valve clearance adjustments.
Now pour yourself a beer and enjoy it!


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

21Back to top Go down   [solved]Valve clearances Empty [solved]Valve clearances on Mon Feb 25, 2019 9:31 am

norton71

norton71
Silver member
Silver member
you said I’m a lot more comfortable with monobloc amal 376? ...me too they make an excellent beer jug long as the float needle doesn't get stuck Very Happy

    

22Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 25, 2019 10:13 am

92KK 84WW Olaf

92KK 84WW Olaf
Life time member
Life time member
@norton71 wrote:you said I’m a lot more comfortable with monobloc amal 376? ...me too they make an excellent beer jug long as the float needle doesn't get stuck Very Happy

You might need bigger jets???


__________________________________________________
1992 K100LT 0193214 Bertha Alaska Blue 101,000 miles
1984 K100RT 0022575 Brutus Baja Red bought 36,000 now 89,150 miles
1997 K1100LT 0188024 Wotan Mystic Red 58,645 now 91,850 miles
1983 K100RS 0011175 Fricka 29,495 miles Damn K Pox
    

23Back to top Go down   [solved]Valve clearances Empty (solved) Valve clearances on Mon Feb 25, 2019 10:39 am

norton71

norton71
Silver member
Silver member
Many is the bike...BSA/ Triumph/Norton/Royal Enfield etc that made a definite gurgling sound due to a mono bloc Amal carby being used ..bigger jets would have been good in the day.... but you can't have both an engine and me sucking through the same jet at the same time ...the engine will always lose. lol Very Happy

    

24Back to top Go down   [solved]Valve clearances Empty Re: [solved]Valve clearances on Mon Feb 25, 2019 2:31 pm

tinyspuds

tinyspuds
Silver member
Silver member
@92KK 84WW Olaf wrote:
@norton71 wrote:you said I’m a lot more comfortable with monobloc amal 376? ...me too they make an excellent beer jug long as the float needle doesn't get stuck Very Happy

You might need bigger jets???
Hence ‘Tiny spuds’ 😂


__________________________________________________
1985 BMW K100RT + Hedingham HUB and LL’s.
2007 HD883 Sportster. Bobbed and bettered.
1954 Royal Enfield 350 Bullet. Original.
    

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