Hi Ralph, Ive just checked mine ,it has about 3" movement measured at the tyre with the gearbox in 3rd. I found having the tickover set to 2000rpm helps at hairpins.
Nigel, Steve and Chris, you all mentioned that the problem might not be with the exhaust and I did have the feeling that the bike was dropping onto one off throttle, I checked the carb balance at the track and found it to be spot on, however, I did have a duff plug, I changed the plugs and the bike would hold steady at low revs and I thought at the time I had found the problem. A small sideways moment at the hairpin proved otherwise and it was just as much of a pain elsewhere. I think I may have just been underestimating just how bad the condition were, they did abandon the meeting after all.
Anyway, the bike hasn't been touched since that day and a couple of days ago I got this off the bench, which is the yellow bike I used to use on track.
View attachment 14234
and put the Seeley back on the bench ready to strip it to get it ready for the coming season. Whilst I was messing about with it I noticed there is, what I consider to be a lot of slop in the drive through the gears, here is a short vid starting with first gear going through to 5th.
I am thinking the thump the engine would give the rear tire going from off to on throttle with this kind off slop would be the cause of my problem. I will strip the box to have a look but I am guessing this is just how they are and probably why the TTI box is so slick.
I hasn't been a problem before, so like I said possibly just an overly slippy track.
Opinions please !!!
I had a high tickover by mistake once and was held a long time in the holding area, I thought the engine was going to melt.
I am going to look at my standard box and measure the movement in that.
Regarding the high tickover , I have a cunning device on my bike that sticks out beneath the seat so I can adjust the tickover if were held for a long period then turn it up before going on the grid; only downside is that some scrutineers insist i put a catch tank on it ,they think its a breather!
So what would be the best exhaust for midrange on a road bike with 920 that is using stock cam, stock rh10 head, stock carbs and maybe 9.5 to one CR?
RGM sells 1.5" twin pipes in a standard upswept shape, that is what I had in mind until now, but I'm not so sure after reading thru this thread.
Dya reckon the balance pipe helps power? I’d kinda concluded it was more about noise reduction...