firstle wrote:love trikes and hope to build one one day (i have the back end and a spare k100) there are two trikes round here and they both have the same problem , gearing , the smaller car wheels ment the revs where quite high at 40/50mph , they both have reliant axels , the rear end i have to use is from a jowet with 19inch wheels , lets see if the diff holds up . best of luck
Hi firstly,
As you say it is all got to do with having the gear ratios right.
I am using a 7 series axel (740i) and when I was looking at buying it I looked up both the ratios of the k100 engine and the ratios of the axel and as the numbers are pretty close together the gearing should not make that much of a difference.
The gearing on the engine if I can remember was around 3.16 and the axel was around 2.98 or the other way round ( sorry if these figures are wrong or the wrong way round )
When I spoke to the guy selling the axel that’s what he told me.
It does also depend on tires so I am not going out and getting the biggest fattest tires.
I will be going with the standard 225/55 R16 tyre and alloy wheels that I also got off the same guy who sold me the axel.
So fingers crossed




Someone else said something similar so either way is good either it will pull away quick and have a lower top end or it will pull slowly and have a fast top end.
As I am disabled so my reactions are not what they were and the fact that a trike is for cruising I won’t be bothered about either blasting away off the lights or doing any silly speeds.
I am going to be riding disabled for the first time ever and have not rode a bike since I got rid of my gsxr750 street fighter I think I will be that very nervous steady learner again.
Thankfully this is not my first trike so know it is going to be hard enough with my damaged spinal cord never mind hanging off it on corners.
I had a xs1100 with a xj6 backend and the ratios on that were well rubbish 1,2,3 great 4,5 useless.
I will keep the group informed when I get round to getting it done.
Sadly we were just about to start backend and get ready for the testing when my mate who is building with me called to say we have to go on hold as his work was sending him out to oz to start a big new job and we agreed his job always would come first when we started the build.
Hopefully he will be back as soon as the plan was for on the road in June but sadly how long it is being delayed is just pure torcher.
Good luck with your build please keep me informed.
