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Dirt Bike Brands - Other
06 yz 250 gearbox problems
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[QUOTE="DLHamblin, post: 1107233, member: 61339"] Well, we have beat this to death in numerous threads here, but to summarize my opinion (not necessarly the opinion of all memebers of course...) An automatic transmission has planetary gearsets, your bike does not. It is a constant-mesh sequential transmission [url]http://auto.howstuffworks.com/autom...ransmission.htm[/url] [url]http://auto.howstuffworks.com/motorcycle3.htm[/url] ATF will provide better clutch action and shifting (depending on bike)... ...at the price of increased wear and tear on the gears. ATF has additives for clutch packs in automatic transmissions that do also help clutch action in dirt bikes. Its is thinner than any gear lube I know so it can help a notchy bike shift better. It DOES NOT have the gear cushion additives that gear lube does (because an automatic transmission does NOT need them...). The design and action of our transmissions is different than an automotive automatic. In the '70's a lot of racers used ATF to help with shifting and clutch action but also knew they were going to get increased wear and tear on the gears. This was an acceptable tradeoff. So the answer to which is better soley depends on how you ask it. Whats better for the gears? Gear lube hands down. Which provides the better clutch action (and possibly shifting depending on the bike), the answer is ATF. I don't use ATF because I expect the longest life out of the bike and don't care about the miniscule difference in clutch feel. I also would not buy a used bike if I know its been run on ATF (but thats just my opinion). However; if you are racing and need that extra bit of performance, change it very often, and won't be keeping the bike long term then its likely a good trade off. [/QUOTE]
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Dirt Bike Discussions By Brand
Dirt Bike Brands - Other
06 yz 250 gearbox problems
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