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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
to create more crankcase comp
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[QUOTE="DEANSFASTWAY, post: 720346, member: 31309"] Georgie we used to work on alot of these 125s back in the day. They actually were a pretty good motor to run for like a year or so but then when things like the crank went or the clutch basket galled up they werent so hot. We sold quite a few HGS pipes and Pro Circuit . For woodsies with a CR(low end power) we were running the thinnest base gaskets possible and advancing the ign timing and they seemed pretty sturdy down low youll need to run good gas though.Boyesen dual stage reeds seemed good also. I think I also used to plug up the crank holes with cork to help build crank pressure. You could play a bit with the power valve too . We made some big bores also and they made good power. I worked at a dealer very close to the importer around that time .They were pretty good bikes but everything has its maladies. Worst thing though was when the cranks locked up (alot of them) On the 250/360 the cranks lasted forever, go figure.On the 125s I used to kinda grind a swail in the crank halves to sort of funnel oil to the lower bearing, and run like .015" big end play on the rod. Good Luck [/QUOTE]
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MX, SX & Off-Road Discussions
Dirt Bike Mods & Maintenance
to create more crankcase comp
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