creaser Posted November 28, 2011 Report Share Posted November 28, 2011 hi! my step son has a 2004 gas gas txt 80 rookie. I am trying to get a little more bottom end power out of it. the bike runs really well and pulls like a train at full revs. This ok but steep hills have to be attacked in first gear flat out.. I have read the other posts about the carb mods. The carb slide is all ready modified. I was thinking about changing the front sprocket from a 12 tooth to a 11 tooth has anyone given this a try before and was it any better? thanks!! Quote Link to comment Share on other sites More sharing options...
helloyes Posted November 28, 2011 Report Share Posted November 28, 2011 Had the same problem with my sons i had the barrel ported and the exhaust port raised also added stuffer to crankcase to raise primary crankcase pressure a LITTLE also skimmed head to set squish to .6mm that fixed it !! was then a match for 2010 beta 80 !! just sold it as he has now moved upto a 125 but he was riding it on the clubman route all this made a massive differance hope this helps :-) Quote Link to comment Share on other sites More sharing options...
creaser Posted November 28, 2011 Author Report Share Posted November 28, 2011 thanks for that who did the work for you? also what was the stuffer? Quote Link to comment Share on other sites More sharing options...
charliechitlins Posted November 29, 2011 Report Share Posted November 29, 2011 You could try adding length to the intake tract. A bit of radiator hose will do the trick. My son had one of these and a lack of bottom end was definitely noticeable. I wonder if a flywheel weight is available... Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.