CHAPTER 11 - TRANSMISSION

[Confucious]

Posts regarding #Transmission

[samwise]

Coming back from my trip to Yorkshire last Tuesday, and I started getting crunching noises when trying to get into 1st from neutral at rest. Carried on by going neutral --> 2nd --> 1st and that was OK, as was dropping it into 1st while still moving.

Got on it yesterday, and cruuuuuuuuuuuunch, first gear not there, 2nd --> 1st was OK, so off we go. Got to my mate's place and sat there in neutral and it slipped sweetly into 1st from neutral, no problem

Chatted for a while, then when I went to go again, cruuuuuuuuuuuuunch. Rolled it back and we adjusted the clutch to see if that would help, but no. He reckons the shift fork is bent

Got home, and it slipped sweetly into 1st again, at rest from neutral. :spitfire: Not what I need just before my two Euro trips

If it's the shift fork, that means splitting the crankcase - not gonna happen in the timescale I've got now Looks like the clutch and left hand will be getting a work out, being pulled in and held in at stops etc

[squirrelciv]

Odd one that samwise Things like selector folks dont usually just up and fail. Only time I ever had anything go wrong with one was atfer a crunch which caught the gearshifter.
Dolly can get a little noisey going into first if the oil's old or low, and worse if the clutch is out of adjustment (usually crunchy first is my que to check ) My money would be on clutch first. More likely to give out suddenly too if you think about it.

Carting all those panniers about must have been the final straw







I'll get my coat

[samwise]

It's only 1st that's affected though - I woud've thought that all the gears would've been affected if it was the clutch

[squirrelciv]

Know what you mean, but things are like that sometimes. Had a GN400 that was a git to engage 1st, worse trying to get back into neutral. fine thereafter, just getting going was the problem. Decided to strip the thing down assuming something awful, got as far as the clutch and discovered a wavey thrust washer had been chewed somehow. Replaced it, bolted everything back together, never had the problem again Don't understand why this weedy thrust washer made such a differance but it did.
I'm guessing, but could it be to do with the way the gear shafts in the box engage with the crank when going into 1st If the drive chain isn't properly disengaged then the vast difference between spinning bits and stationary gears gives the problem. 2nd gear may (I don't know) be a different layshaft.
Either way a good nosey round the clutch is simpler than spliting the crank, and if that's what needs to be done then the cluch has to come off first anyway Go for the easy first and add a lot of prayers/crossed fingers/rabbits feet.

[anton88]

Ben - not teaching one to suck eggs, but if this helps: if you take off the clutch cover, make sure youve got :

1) a new gasket

2) new clutch plates/springs - if you think it needs them.

Buy or use an old allen key for the size of the case bolts and cut the end off so it is straight. You can then use this in a socket to reach the bolts at the top of the side cover - i didnt have a long enough bit to reach them so improvised.

Also take it easy, unless youve taken the side off before, as all my bolts/nuts were very stiff - luckily didnt snap anything.

Hope you find and fix the problem - god forbidd that its an engine out/split case job !

[samwise]

Update tonight on the way to watch TT practice - crunched a little on starting at my place. Got to my mate's 11 miles away, stopped for a while waiting for him to get ready then started again and it snicked into 1st without a problem.

Got to Douglas Road Corner in Kirk Michael, watched the practice, back on the bike, started up and it went straight into 1st no problem.

Back to his for a cuppa, back on it to come home and straight into 1st no problem

The only thing that I've done is topped up the oil Friday evening, rode to a mate's here in Douglas and back with some crunching issues, but nothing since - I wonder what oil the dealership used at the service, and whether adding the Silkolene Comp 4 has improved it?

[squirrelciv]

Dolly can get a little noisey going into first if the oil's old or low

Nahnah na nahnah. Told you so Dommie gear boxes do seem to be susceptable to low/poor oil. Can't figure out why though.
No matter what now, you can definiately discount the selector drum. Things like that just don't repair themselves.
Good news though well done matey.

[samwise]

If it carries on OK, then I won't worry until after I get back from the Dolomites at the end of July - I may put it into a guy called Slick here on the island at the end of the summer for a revamp - he does race bike engines over here

If it survives the trips this summer, then I'll be looking at giving it a going over in case I take it to the US for a month in autumn 2007 (it's either fly it over, or buy and sell back over there)

[samwise]

Buggeration, went out tonight to show a guy from ADVRider and his missus to Brandywell corner using the back road to watch practice, and no 1st gear again, and even lost it dropping down from 2nd whilst moving one time

Think I'm gonna have to bite the bullet and hope that the dealership can fit me in over the next week or so to check the 'box out, prior to going away to France on the 16th