EnduroDude
Member
- Jan 21, 2003
- 100
- 0
Originally posted by fuzzy
Need a wide ratio trans :) ala RMX
Originally posted by fuzzy
Sweet! There is your solution my friend...You can bet your butt that Team Suzuki's GNCC bikes have this setup! Same w/ team yamaha's YZ250's having WR gears...
Hey Steve,Originally posted by snb73
EruoDude,
Try increasing the preload on your exaust valve spring. If you put more preload on the spring, the exhaust valves will open later (at higher rpm's). Keeping the exhaust valves closed longer (for more of the rpm range) should give you more usable torque and less of a hit.
This won't replace a porting job, but should give the bike more low end torque for more of the rpm range. Plus it's a free mod.
Hope this helps, Steve.
Cool, thanks Steve- that is the one I was thinking about. Factory setting is 1/2 turn preload. I will try 1/4 turn at a time past and test it out.Originally posted by snb73
EuroDude,
I'm refering to the spring that is located on the top left side of the cylinder
Here's a diagram, yours should look simular.
http://houseofmotorcycles.bikebandit.com/partsbandit/showschematic.asp?dept_id=124027
Steve
Excellent idea Steve,Originally posted by snb73
EuroDude,
I'll be interested in your results. I would suggest using a "sharpie" permanent marker to mark your starting point. I'd keep a log and annotate what effect each position had, bad or good.
Thats an interesting thought but I bet that it would cut performance everywhere bottom to top. Midrange is too hard a hit for me where I ride but I would welcome even more bottom end down real low. My top end power is no good at all but I hardly ever ride it there so I don't even notice unless I wring it out on a road.Originally posted by joereitman
Anyone consider a restrictive washer between the cylinder and the expansion chamber like in the JR50 and the PW80?
Thanks for the info Vytas,Originally posted by Vytas
Actually you want to lessen the spring force on the exhaust valve. This will result in the valve opening easier and sooner. If the spring tension is increased then the valve will open when there is enough force generated to overcome this spring force. The greater the spring tension the HARDER the midrange hit, lesser spring tension means MORE MANAGEABLE midrange hit.
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