how many turbos are out there

[DEATH_INC.]

When we did the CM we simply plumbed her up and went.Since then we've lowered the compression for reliability,but it ran fine as it was.
There are a few kits around that bolt on with no mods,but most only run 4-5 psi,enough to give a bit of a boost,but not earth shattering performance.
The easiest way is draw-thru,where the turbo sucks thru the carb,you're supposed to run a fully sealed turbo to do this,but with the small amount of vacume generated on a bike,it's not normally too much of a problem.The turbo needs to be above the oil level of the engine( so it can drain back in...)and reduced compression will be a bonus.Make a simple intake manifold,with the inlet from the turbo at an angle so it doesn't aim at any of the ports,otherwise it will send more fuel to one of them,usually resulting in another being lean(not good).Make a set of headerpipes,simple,you don't need to worry about tuned lengths too much,as short as possible(helps reduce lag)running to the turbo.Find an oil feed,the pressure switch hole normally works well,and plumb it up to the turbo.make up a return for the oil,keep it big,and plumb it into the cranckcases(the clutch cover works well as you can remove it easily for machining)remembering to keep it above the oil level.Easy.
Things to watch for:Lack of oil volume/pressure,bikes don't have huge pumps or sumps so the bit you're stealing for the turbo may starve something else.....
Backfiring and blowing the intake manifolds off the engine,cured by fitting some sort of large pressure releif valve.
Mixtures,a turbo will melt pistons real quick if you lean out at high rpm....
Gearbox,clutch ect,if you're making twice the output of the stock engine(blown gears are common on non factory turbo bikes).....
Of course there's lotsa little common sense stuff too.
And contrary to belief,you'll need a muffler,a turbo is only quiet when it's not making boost.....
Good luck,and don't come growling when you blow it/yourself up......

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While we are talking turb's a mate has a ('man I realy dont want ta say it') Yamaha XJ650 turbo and he needs a turbo for it. The question is what type of turbo is on it?

Ok the XJ which blows through the sealed carbs (these are different to the std type of carb) has a 16G turbo like those used by Mitsi but in order to corectly match a turbo my mate needs more info other than a 16G........ any help is welcome.

ps: the turb for this bike is missing.

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If you're looking for a replacement you don't need to be too fussy.anything round t2 size will work ok.
If you want an original,good luck but you could try the turbo motorcycle owners site: http://www.turbomotorcycles.org/

[dangerous]

If you're looking for a replacement you don't need to be too fussy.anything round t2 size will work ok.
If you want an original,good luck

Hay thanks for all the help, My mate with the XJ wants to restore it to orig I dont like his chances at finding the correct turb either, I would be going for a sub turb or similer aswell..... hell its not like they were a very nice bike to start with the performance wasent that much better than the 750 nat asp that went into the same frame and boby work in the following year.