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Changing camshaft/valve springs Changing camshaft/valve springs
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Yamaha Tech Originally the Yamaha XT600 Tech Forum, due to demand it now includes all Yamaha's technical / mechanical / repair / preparation questions.
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  #1  
Old 10 Oct 2014
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Changing camshaft/valve springs
I have a performance camshaft and heavy springs for the valves, how much power will i gain installing this? How is it so adjust the valves? Do you change headbolts when every time head is off?
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Old 10 Oct 2014
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You will need more mods to get everything out of this new cam. (carbs/exhaust/piston/maybe bigger valves and porting)

Where did you buy everything? I want them too
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Old 10 Oct 2014
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That's a good question. I have only found 1 cam that does not require a high compression piston. They say it will improve across the whole band. It will let more air and gas in up to the limits of your existing carb. If installing a bigger carb will improve power on the stock cam , is there much to gain by adding a better cam to a maxed out stock carb? Let us know.THUMPTHUMP
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Old 10 Oct 2014
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Ok, but i have kn filter, new exhaust, and dynojet kit. I know they change only cam on cars and get more power. Have the high comp piston, but i dont know if i want to change, i quess the wear on the rest will be high. Its some old stuff bought from whitebros, piston is wiseco.
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Old 10 Oct 2014
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Go for it , If you have the high compression piston it can use bigger and longer intake duration. It will also like to expel the exhaust quicker. If you are going to play, play to win. THUMPTHUMP
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Old 10 Oct 2014
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Well i dont know, bike is running perfect now. Maybe i change everything and get alot of adjustment problems again, its not like done in one hour changing back again. JJ is doing the swap so ill wait and see what he says about the bike after. First of all i need to get the headcover fixed..
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Old 11 Oct 2014
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In my opinion, these bikes are NOT race bikes or even close. They are Tractors and do the intended job very well for a very long time if taken care of properly. If your engine is running fine, no smoke, no excess clatter, leave it alone and it will continue to do so. My 86 has maybe 15k miles, not sure as speedo was broken for years, but a recent compression check with a brand new gauge showed it to have 171 pounds of compression. This is at the top of the range for this stock engine. The bike used a slight bit of oil and always has, it does NOT smoke or clatter excessively and pulls like a "Tractor". I plan to keep it just as it is. I do plan to try some cartridge emulators to smooth out the harsh ride and perhaps a new adjustable rear shock.

I am looking for suggestions for a new rear shock, any ideas anyone?
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'84 XT600 is now bored to 2nd oversize and new OEM pistons and rings installed. No more smoking.
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