jon haney Posted April 29, 2015 Share Posted April 29, 2015 (edited) I'm thinking of drilling some extra "oiling" holes in my inner clutch hub, as my clutch plates appear to be a little on the dry side whenever I do maintenance. Plus, I'm having some consistency problems with starting line slippage. Has anyone here ever drilled additional holes in the inner hub of their Bird clutch, or know someone that did, and what was the results? Thanks. Edit: Stan? Joe? Dean? Tomek? I'm not really the pioneering type, but I'll probably drill the holes anyway, unless someone can give me a good reason not to try it. Edited April 29, 2015 by jon haney Quote Link to comment Share on other sites More sharing options...
The Krypt Keeper Posted April 29, 2015 Share Posted April 29, 2015 I honestly have no clue about drilling the holes.. I was curious at weight and type of oil you use, could these be an issue or maybe solve it. Quote Link to comment Share on other sites More sharing options...
jon haney Posted April 29, 2015 Author Share Posted April 29, 2015 I honestly have no clue about drilling the holes.. I was curious at weight and type of oil you use, could these be an issue or maybe solve it. Amsoil 10-40 motorcycle specific. Problem seems to show up after 3 to 4 races. Fresh oil seems to help, but usually that is accompanied by a slight increase in clutch spring pressure. I should clarify that I'm running different steels and fibers than stock along with ZRX1200 springs and a single-stage lock-up. Just curious if anyone had ever tried drilling extra holes for better oiling. Quote Link to comment Share on other sites More sharing options...
Furbird Posted April 29, 2015 Share Posted April 29, 2015 I'm no help either. Both the Furbird and The Artist Formerly Known As Furbird were run with stock engines and clutches. Quote Link to comment Share on other sites More sharing options...
blackhawkxx Posted April 29, 2015 Share Posted April 29, 2015 If you decide to do it, I would pick up a spare clutch hub first, just in case. Quote Link to comment Share on other sites More sharing options...
rockmeupto125 Posted April 30, 2015 Share Posted April 30, 2015 A "little" dry or stuck together dry? What do your steels look like? I'd say absolutely yes, just be cautious where you drill, you don't want to muck up a cog in the process. Remember, you don't have to drill straight through, angle the drill for the best placement. Quote Link to comment Share on other sites More sharing options...
jon haney Posted April 30, 2015 Author Share Posted April 30, 2015 A "little" dry or stuck together dry? What do your steels look like? I'd say absolutely yes, just be cautious where you drill, you don't want to muck up a cog in the process. Remember, you don't have to drill straight through, angle the drill for the best placement. No sticking. Best way to describe would be "no oily shine". Steels look great, but they are the high-performance chrome-plated ones that MTC sells. Pretty much guaranteed not to warp. You can turn the fibers into charcoal, but these steels will still be straight. Seen it first hand. Been running the same set for years. Quote Link to comment Share on other sites More sharing options...
partsman Posted May 5, 2015 Share Posted May 5, 2015 I was looking at those tiny holes last year and wondering the same thing.Too chicken to try it.What friction plates are you using? I'm trying the old Kawi Z plates this year,haven't installed them yet,13088-030,much cheaper.Haven't heard of these MTC plates,'course I never check their site much either.Do those steels still have dimples in them? Quote Link to comment Share on other sites More sharing options...
jon haney Posted May 5, 2015 Author Share Posted May 5, 2015 (edited) I was looking at those tiny holes last year and wondering the same thing.Too chicken to try it.What friction plates are you using? I'm trying the old Kawi Z plates this year,haven't installed them yet,13088-030,much cheaper.Haven't heard of these MTC plates,'course I never check their site much either.Do those steels still have dimples in them? I'm using the KZ-1000 fibers that MTC sells. Not sure if the same as OEM. Doubtful. Yes the MTC steels have dimples. I went ahead and drilled about 5 more holes in strategic places, but smaller than the ones Honda drilled. Can't say for sure that it helped, but I did win Saturday. :-) Pushed through the clutch a little on my bye run to the final, so I added just a smidge of spring pressure and had my best 60 foot time of the day. The experiment never ends. Edited May 6, 2015 by jon haney 1 Quote Link to comment Share on other sites More sharing options...
The Krypt Keeper Posted May 6, 2015 Share Posted May 6, 2015 Congrats Jon. Quote Link to comment Share on other sites More sharing options...
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