i bought a used foreman. the guy told me he had the top end rebuilt and it ran for awhile and then quit. so i started with checkin valve clearance. first thing i noticed was i could not get the timing marks and valves to match.(when the "T" was in the window the exhaust valve had already started to open). so after i kept messing with it i noticed there was no gas on spark plug. so i took the air filter off, gonna spray some startin fluid in there. well with the filter off and you turn motor over its blowing the compression out thru the carb. has it jumped time and if so how hard is that to fix? thanks.

 

it sounds like it jumped timing its not hard to change just unbolt the front diff pull the driveshaft stand the bike up on the rack tie it off so it doesnt fall on you then remove the front engine cover a book would help

 

thanks i'm looking into getting a book right now.my wife is in town by the quad shop.

 

the book doesnt tell you to stand it up, but it makes it easier. also you will have to remove the skid plate on the bottom of the bike for better access

 

when i get in there, is there a key or something that sheared? they don't have a book at my local shop so i got to order one. and if it's a key i'd like to take a chance and go ahead and order it too. thanks

 

no key on that side of the engine it should be self explanatory you may want to get the nuts for the clutch(s) though sometimes they strip

 

cheapcycleparts.com has a parts diagram that may help you

 

oh, i didn't know it had a timing chain, since the cam is in bottom of engine. thanks for that info. now let me ask you this, can i get the tensior off without taking the head and jug off?

 

no you cant im sorry that i forgot about that

 

On a TRX450 we replace the cam chain with the bike on the rear wheels & rear rack .. If you do it on it's wheels whatever you do don't remove the camshaft itself or the lifter/s could drop inside the crankcase and the cases would have to be split to remove them ..