LCGB Forums

dickie wrote:I had pacemaker and 17/47 on my gt186 with bgm clubman. That was perfect. Same set up with jl3 curly was good too. I'd imagine you've got a decent combination there, but it does sound like you're over geared.

I think that pipe peaks around 8000rpm which would give you about 75mph on that set up. Might be a tall order from an untouched kit.

Has it been on a dyno?

Norrie Bodge wrote:With your crank 60x110 what base packer is used?

Simon_T wrote:

dickie wrote:I had pacemaker and 17/47 on my gt186 with bgm clubman. That was perfect. Same set up with jl3 curly was good too. I'd imagine you've got a decent combination there, but it does sound like you're over geared.

I think that pipe peaks around 8000rpm which would give you about 75mph on that set up. Might be a tall order from an untouched kit.

Has it been on a dyno?

Hi Dickie,

had it dynode yesterday by John Gilbert said its almost bang on and made 20.5 bhp.

MickYork wrote:

Simon_T wrote:

dickie wrote:I had pacemaker and 17/47 on my gt186 with bgm clubman. That was perfect. Same set up with jl3 curly was good too. I'd imagine you've got a decent combination there, but it does sound like you're over geared.

I think that pipe peaks around 8000rpm which would give you about 75mph on that set up. Might be a tall order from an untouched kit.

Has it been on a dyno?

Hi Dickie,

had it dynode yesterday by John Gilbert said its almost bang on and made 20.5 bhp.

At what rev's did it make it's power ?

Adam_Winstone wrote:Some of this may depend on how you are trying to ride it. The Fran Race will not really suit someone who just wants to put a bike into 4th gear and then potter around town, whereas it will love being ridden like it is stolen, thrashing it at higher revs around country lanes (on short gearing) or at higher revs on the open road.

Same goes for whether you weigh 7 stone or 17 stone, travel 1-up or 2-up.

Your advance/retard function on your ignition may be playing its part in this too, retarding too far at the higher revs, etc. I thought that Richard Taylor didn't recommend advance/retard ignitions with the GT kits?

If the motor is putting out 20+ BHP then I imagine that it is doing so at reasonably high revs, which also makes me think that it may be short of power at lower revs... but that would take me back to how and where you ride it.


Please note that all of the components are very good and my thoughts above are not to find fault in any of them, rather just reflecting on the how the combination may or may not suit your intended use/riding style/requirement. Indeed, I have experience of all of those components and know them all to be good at the tasks that they are intended for. Knowing that some of my clubmates would love riding such a setup, whilst others would hate it... horses for courses.


Good luck getting it sorted.

Adam

Simon_T wrote:Thanks for your input Adam,

Like I say it seems to want to go in 1st 2nd and 3rd gear and reaching a high R.P.M and then dies, I have tried 18x47 li 125 with same exhaust and also tried mb clubman and now on a pacemaker box and come down from a 17 sprocket to a 16 sprocket now but unfortunately it still sees the same result as slowing down, so do you see this as a timing issue with the Varitronic I know Richard don't recommend them but I thought I would try it although I haven't tried a static 17 degrees ignition on it