majorwinters

then if it is how do i fix the problem new to bikes btw?

is it supposed to rub on the tensioner block?

ty 80 chain rubbing noise on chain tensioner why is this? it came off tensioner becuase transporting .then i put chain back on and when i push bike its a rubbing noise. there is rubber on the tensioner isnt fully worn??

somone mentioned 60 to 1. can i use castrol racing fully synethetic in my ty 80 it says for highly tuned engines a know a tyy 80 is an old motor.but if i run 50 to 1 or 60 to 1 will be ok???? what about valvoline what ratio can i run this 60 to 1 is safe.its supposed for racing i guess.but in a ty i can run it?? normal gasoline 95 octane

around 175 lbs. . everything else seems ok just need to put in the new cylinder studs fit new gasket. torque down cylinder head should be good to go again/. i would gotten 125 but ty 80 fits in the car boot while 125 wont/. . but the ty 80 is a fun bike to ride.. might try a 50 to 1 fuel mix and see if its better.

oh i tried yambits i couldnt find the engine cylinder studs out of stock. i orderd 4 studs and 4 new bolts plus shipping cost it came to around £60. so 50 to 1 isnt to lean? bloke i got it from ran 40 to 1 should i run 50 to 1? so 100 ml of oil per 5 litres of fuel wont sieze the piston?

recently bought a 1975 yamaha ty 80 b. i run fuel oil ratio 40 to 1. do you need expensive 2 stroke oil. will using i use semi synthetic cost around £9. should i use castrol or will regular scoooter motorcycle 2 stroke work.well. also what compression should a ty 80 have the haynes manual states 78 psi warm engine>?? 78 psi seems low. piston and rings look ok think there quite new by the looks. rings and bore seem ok. i can get photos if needed not an expert on engines just picked up some knowldge over time..iIhad to order new head gaskets studs becuase the owner before had used a cut off piece of gasket.it was circle had the edges cut offf and it failed. had exhuast gases blowing out from the cylinder. cost around £70 to buy 4 new studs 4 new bolts gasket set. i am an adult but becuase i dont have a trailer to transport my bike a ty 80 fits in the car boot. e.will the engine last carrying my weight.i know this sized bike was desighned for 5 to 12 yr olds not fully grown man but its a fun bike to ride.its my first motorcycle.