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mx_rider23

pressure release?

9 posts in this topic

im looking at a yz 450f and the guy said that you have to pull it with a truck while 2 people sit on the bike to get it started and he said it could be fixed with a pressure release?

im just wondering what that is, if it would actually fix it, and if so, how much the part would cost?

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I'm guessing he means a decomp. I beleive the 450f's do not have them and by switching a to a WR cam you gain this feature which makes for easier starting. Otherwise he needs to learn how to start his bike or fix whatever is causing starting so difficult. It does take a bit to get them to turn over but there is a kick starter there for a reason, and that reason has nothing to do with dragging the bike to get it started. Your supposed to kick the bike once or twice to start it and be on your way.

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Even of you are serious, I would walk away!

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Oh boy. I picture two guys in bib overalls on the bike with a dude that looks like joe dirt driving a beat pickup down a dirt road just trying to 'git that' YZ to just 'release'. Do yourself a favor and please pass on that gem.

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Oh boy. I picture two guys in bib overalls on the bike with a dude that looks like joe dirt driving a beat pickup down a dirt road just trying to 'git that' YZ to just 'release'. Do yourself a favor and please pass on that gem.

I had the same exact image in my head! :lol:

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He probably means a decompression mechanism, which that bike already has. My rule of thumb is that if a guy cannot fix his own bike, I don't listen when he tries to tell me how to fix it.

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If a bike is hard to start don't buy it. Not worth the hassle imo. Unless you are getting it as a fixer upper and want to wrench on it. I don't know 4t's very well, but well enough to assume it has more issues than he is letting on.

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As noted, the bike has an auto-decompression system to allow for easy starting. The reason the bike won't start is something is wrong with it. My guess is the head is shot and probably needs a piston and rings. If the price is real cheap and you're capable of doing a complete rebuild yourself, I wouldn't necessarily say don't buy it, but is it worth it compared to what the price is on a clean, easy to start bike that needs no work?

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