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1Back to top Go down   Cam Chain and tensioner Empty Cam Chain and tensioner on Mon Oct 21, 2013 2:51 pm

TIV

TIV
Silver member
Silver member
Yesterday I checked the tappet clearance on my K75 and as it turned out, there is no need for adjustment. Between 0.15 and 0.20 on the intake side and between 0.20 and 0.25 on the exhaust.


While doing this I noticed that the cam chain is kind of loose on the cam wheels. There seems to be a play in the mechanism and the chain is slack, you can rotate one cam slightly before the other moves and visa versa. I read somewhere that the cam chain tensioner is controlled by a spring and oil pressure. Could this be normal when there is no oil pressure? 


With only 40.000 km on the clock I wouldn´t have thought that there was anything wrong with the cam chain, but this strikes me as odd. 

Please take a look at this video an tell me what you think:
Cam Chain and tensioner Th_Camchain_zps2898fe30



Last edited by TIV on Mon Oct 21, 2013 7:23 pm; edited 1 time in total


__________________________________________________
1936 Harley Davidsson 750 (sold), 1964 BMW R69S (sold), 1973 Suzuki RM400 (sold), 1972 Triumph Bonneville (sold), 1971 BSA Thunderbolt (sold), 1972 BSA Lightning (sold), 1977 Yamaha XS650 (sold), 1971, BMW R75/5 (sold), 1973 BMW R75/6 (sold), 1984 BMW R100RT 1992 Yamaha FJ1200 ABS (sold), 1990 Harley Davidson Electra Glide (sold)
1990 BMW K75RT Ex-Police (owned now)
2004 BMW R1150RT iABS (owned now)

Cheers TIV
    

2Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Mon Oct 21, 2013 4:50 pm

walfish

walfish
Life time member
Life time member
I would replace the chain, to me it seems worn. Count the number of links and buy a good quality length of chain.
Cam Chain and tensioner 22936


__________________________________________________
Cam Chain and tensioner Uk-log10 88 K 100  0033026 
   
                            92 K 1100 LT  6455097
    

3Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Mon Oct 21, 2013 10:09 pm

RicK G

RicK G
VIP
VIP
From what you are doing there it is not possible to say either way good/bad.
Check the blue arrow on this pic and if you can lift the chain away from the sprocket when there is load on the chain (the engine is turned over to a point where the chain top run is tensioned) then the chain needs replacing.
Is shows the chain is stretched and the links on the chain are longer than the sprocket.
Cam Chain and tensioner Image210
The oil pressure only holds the tension on the bottom run of the chain to prevent it from flopping about and comming off the sprockets and wearing the sprockets. When the engine is running the tensioner has no bearing on how tight the top run of the chain is because the engine ALWAYS drives the cams.


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


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

4Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Tue Oct 22, 2013 4:09 am

duck

duck
Life time member
Life time member
40K km?  Worry about it in another 100K km.


__________________________________________________
Current stable:
86 Custom K100 (standard fairing, K75 Belly pan, Ceramic chromed engine covers, paralever)
K75 Frankenbrick (Paralever, K11 front end, hybrid ABS, K1100RS fairing, radial tires)
86 K75C Turbo w/ paralever
94 K1100RS
93 K1100LT (x2)
91 K1
93 K75S (K11 front end)
91 K75S (K1 front end)
14 Yamaha WR250R
98 Taxi Cab K1200RS
14 K1600GT
http://www.ClassicKBikes.com
    

5Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Tue Oct 22, 2013 5:57 am

TIV

TIV
Silver member
Silver member
Great, thanks.


__________________________________________________
1936 Harley Davidsson 750 (sold), 1964 BMW R69S (sold), 1973 Suzuki RM400 (sold), 1972 Triumph Bonneville (sold), 1971 BSA Thunderbolt (sold), 1972 BSA Lightning (sold), 1977 Yamaha XS650 (sold), 1971, BMW R75/5 (sold), 1973 BMW R75/6 (sold), 1984 BMW R100RT 1992 Yamaha FJ1200 ABS (sold), 1990 Harley Davidson Electra Glide (sold)
1990 BMW K75RT Ex-Police (owned now)
2004 BMW R1150RT iABS (owned now)

Cheers TIV
    

6Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Tue Oct 22, 2013 7:19 am

Ghost who rides

Ghost who rides
Life time member
Life time member
Mine has done 200,000kms and I know i've gotta do it NOW. Just in the last 5,000 I reckon, getting noisier, so time.


__________________________________________________
1986  K 75 C   2nd owner 187,000kms showing .
1987  K100RT  Police repainted, rough and unloved.
    

7Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Thu Dec 05, 2013 11:48 pm

floyd

floyd
Life time member
Life time member
Ive just a quick look at mine and done the test RickG recommends above with the help of the picture...

I assume there should be very little side ways movment of the chain i.e. the links should be held together rather 'solidly'?

Mine have about 4mm+ free play between links, side to side.....I cant imagine thats normal?


__________________________________________________
K100 with lots of K1100 bits - mongrel of a thing...
    

8Back to top Go down   Cam Chain and tensioner Empty Re: Cam Chain and tensioner on Fri Dec 06, 2013 3:21 am

RicK G

RicK G
VIP
VIP
Not at all normal, how far does the chain lift from the sprocket?


__________________________________________________
"Man sacrifices his health in order to make money.
Then he sacrifices money to recuperate his health.
And then he is so anxious about the future that he does not enjoy the present; the result being that he does not live in the present or the future; he lives as if he is never going to die, and then dies having never really lived."   Dalai Lama


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

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