Hi Gents New to the forum, so firstly let me say Hi! So I need all of your expert advise, been having a bit of a torrid time lately with my 55 plate 749. Bought the bike about 2 years ago and it's been very reliable, although I'm a self confessed good weather biker so it's not had millions of miles put on it. Well basically about 5 weeks ago the good old clutch failed so I have replaced it myself. No great shakes, anyway I was not far from getting it all buttoned up. Last thing to do was to change the oil and put the faring's back on. Took the sump drain bung and found this. Anyone got any ideas where on earth it could be from. It's about 1.25-1.5mm diameter, hardened, and looks like some kind of locating pin. Any suggestions gratefully received.
It's a part of 3 possible springs. The return spring, item 1 in this picture: Or the selector fork return spring, 20 in the picture below. Or the gearchange lever return spring, 27 in the picture below. The first one is behind the clutch side cover so needs the clutch drum removed to get it off for access. The other 2 are under the alternator side cover but need the flywheel off to replace. It looks most likely a part of the return spring. The springs themselves are very cheap.
Cheers Gents. Like I say it was in the sump and I had the clutch out. My guess is its the gear change return. Question is though, everything appears to be functioning correctly, ie the spring hasn't snapped. Do you recon its just the tail of the spring?
The spring pushes a lever with a roller on the end of it against the selector drum so that is falls into the detents at each gear position. It keeps the selector drum from rotating from each gear position. I've seen a few bikes where this spring has broken and it seems to have little effect on the operation. It would be advisable to replace it though as it could help prevent false neutrals. If the selector fork return spring was broken you would probably have difficulty in selecting gears. If the gear lever return spring was broken the lever would drop down and not return to the central position so you'd be able to change up easily but not down.
