Scooterotica

Had a club man on it pretty much the same plus the baffles fell out of it after a few weeks that's why I put my jl3 on it , could be the gearing , or clutch slip as joe said , tho I haven't got the money to splash out on a new gearbox

Well if you check out clutch and everything is fine, see if you can borrow an sx / jet 200 gearbox and just try it ..... Because you will easily be able to do a straight swop for your pacemaker with someone . No money to find.

Good idea , but finding someone here that has an sx box to borrow will be had enough lol thanks tho

That combination of gearing gives you 4.91:1 and at 60 mph you should be doing around 6,000 rpm which isn't exactly screaming Putting a 18 tooth fron sprocket on will drop the gearing to 4.7:1 and knock 200 rpm off at 60 mph but it's [possible that your engine might struggle to rev out in 4th. Is your mate absolutely sure that it has a 17 tooth sprocket on it? With standard Pacemeker gears and sprockets (15/46) your revs would be 6700 rpm at 60 mph (5.65:1).

If all else fails, get yourself some earplugs

(All data taken from Aventoners superb visualiser)

Hi coaster , yes it's defo a 17th front sprocket I've checked this three times now as the scooter is laying on its side with the casing off at the mo , 17 / 46

pacemaker box is the best box suited for you and most other engines used with the correct sprockets you cant go far wrong,if you try the sx /jet box it will soon sort out the clutch,try the 18t sprocket but pull the clutch out to inspect your halfway there with the side off.
if the mugello isnt high hp then your better sticking with the pacemaker box!

just as a tangent thought, how long ago did you put the jl on and what's the plug like after the plug chops???

Pipe has been on now about a year plug colour always seemed fine tho I did blow a hole in my piston awhile back put that down to dodgy fuel timing all fine 17 degrees bang on new piston run in checked plug again after 4 nation rally awhile back colour was fine haven't been on scooter since then

you did rejet though between the clubman and the jl though didnt you?

Nope , 122 main in it I just left it as was told it setup rich needle top clip with foam filter