996 damaged gearbox opinions please?
 

Although more than happy with my results fron Snetteton last week the bike had become increasingly difficult to change between 2/3 particularly downshifting and more so as the bike went faster/got hotter. After checking the selector was correctly adjusted I decided to bite the bullet and split the cases. This is what I found.
Although the damage to the dogs is what seems minimal to me (my first gearbox issue) would this have been enough to manifest itself as the problem?
Drum/forks/gears all perfect.

That damage is initial engagement, the flanks of the dogs have an angle ground on them to hold into mesh. I would sit for a while and stone those areas. Have you had some clutch drag?? The gear slots look the worse affected.

No drag Phil. Just a pain to get into gear. It wouldn't jump out of gear once in but if I didn't make an over positive change I would get a false neutral etc.
Considered taking off 3 dogs on each gear?

Fresh box in now just waiting for headgaskets.

The drive side of the slots have had some trauma, has it been used with a quick shift kit now or prior.

Third and fourth I wouldn't have a prob removing the dogs, as the torque is considerably lower.

If the selector fork and all the teeth on the gears are OK I'm suprised the slots are that damaged, unless there is a shimming issue.

Which box did you replace it with, 996 or a 748 with closer ratios

Don't know Phil if it has had a quick shifter in the past but apparantly had been raced before in SOT according to Paul.

996 Kev as it was free, I would have had to buy the closer ratio 748.

I do not think that the guy we bought the bike off of used a quick shifter, at the time Paul bought the bike i checked his race times, his best time for the old Snetterton, was over the 1 min 20 seconds, i was faster than that on my f400 racecbike:o . The back of the bike was so low it would have been as slow as a barge to turn, so i do not think he would have used a quick shifter and no mention of one when we picked the bike up.


Chris:burn:

I have a 748 cluster in bits in the workshop Neil. If you can rebuild a box of bits you welcome to have a look.

Mike.