Kross Kountry Posted May 2, 2010 Share #1 Posted May 2, 2010 No I don't mean road rage or Anti-Government speech. I just changed out my Final drive (aka pumpkin) to a set of V-max gears from Sportmax. Its been raining since I finished so I haven't had a chance for a test ride. But one thing that I have noticed is that the new Pumpkin seems to have about twice the backlash as the factory gears. When I ordered the part I did ask John, the owner of Sportmax, about the backlash and he stated that it would be set to factory spec. I felt like my factory set had a little to much, wasn't sure thought. Now I know that there are several parts of the drive train that contribute to the total amout backlash, and too little backlash is a recipe for problems (heat, gearwear, gearwhine and owner whine). So here's my questions to those who know? 1 - Can you measure the total amount of lash at the tire? ie Mark the tire tread, in gear, measure the total free play. 2 - If so how much free play should there be? Mine measure about two inches with the V-max setup. 3 - Could my factory set of gears been too tight and causing some of the gear whine? I have had the clutch basket changed once with no real good results. I should add that John at Sportmax was very nice and went out of his way to get me the parts quickly. So far he gets an A+ for service. Link to comment Share on other sites More sharing options...
Whitlow Posted May 2, 2010 Share #2 Posted May 2, 2010 I'm interested in know just how you like the different set up I was thinking about doing this myself. Link to comment Share on other sites More sharing options...
dingy Posted May 2, 2010 Share #3 Posted May 2, 2010 What kind of bike you got? Gary Link to comment Share on other sites More sharing options...
Kross Kountry Posted May 2, 2010 Author Share #4 Posted May 2, 2010 What kind of bike you got? Gary 2008 RSV, I changed my user cp once, maybe it'll stick this time. Link to comment Share on other sites More sharing options...
dingy Posted May 2, 2010 Share #5 Posted May 2, 2010 2008 RSV, I changed my user cp once, maybe it'll stick this time. This is going to be an apples to oranges comparison then. I have a 2004 FJR rear end, very similar to Vmax rear end. 1988 engine. I measured right at 1 3/4" at outer edge of rear tire, with bike up on center stand. Gary Link to comment Share on other sites More sharing options...
Kross Kountry Posted May 3, 2010 Author Share #6 Posted May 3, 2010 Thanks, Dingy Thats close enough for a town this size. I would be interested in what the other members come up with on their bikes. Most especially those with a lot of gear whine or chirp. Link to comment Share on other sites More sharing options...
Squeeze Posted May 3, 2010 Share #7 Posted May 3, 2010 You should pick a one Gear to check that Amount. This "total" Backlash is different in each Gear. Link to comment Share on other sites More sharing options...
dingy Posted May 3, 2010 Share #8 Posted May 3, 2010 This is going to be an apples to oranges comparison then. I have a 2004 FJR rear end, very similar to Vmax rear end. 1988 engine. I measured right at 1 3/4" at outer edge of rear tire, with bike up on center stand. Gary You should pick a one Gear to check that Amount. This "total" Backlash is different in each Gear. 1 3/4" was in 2nd gear Closer to 2" in 1st gear Gary Link to comment Share on other sites More sharing options...
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