webi

thanks i thought it was a bit wierd ive talked to fosdyke a few times he is alot of help

my mate had this problem he used to tap the starter motor with a hammer or something then try it but then he took his starter motor off and the bushes had worn alot and the magnetic walls inside had cracked i suppose it got too hot and seized maybe time for a new starter motor wait for some other replies first as i might be wrong other people on this forum are alot better than me

i have a yb100 and its name is beauty and the beast the bikes name is beauty will leave you to work out the rest

welcome to the forums darren hope you enjoy it

hello i have a 1988 yb100 deluxe model i read a post on here that says the silencer should weigh half a kilo but mine ways nearer 3 kilos just wondered if this is right or not the baffle has also been cut down by the previous owner would this affect performance as i am only getting 40-45 out of this bike i am quite heavy though i weigh about 17-18 stone. all help is apreciated cheers webi

welcome to the forums mark hope you enjoy it

hi i have a yamaha yb100 1988 and when i top up the oil it only lasts for about 5 gallons does this sound right to you?

welcome to the forums mark

hello im 17 and thinking of doing my test to restrict me to 33bhp for 2 years and i was wondering if any of you know how hard it is because ive heard alot about the dreaded swerve test just looking for a bit of info on it really. cheers webi

hi, i was just wondering if anyone know where i could find an expansion chamber for a 1988 yb100 or would i have to get one made up special like? edit: also what oil do i use to re oil the air filter?

there are some good sites about mate try this one

slider was in the right way blew out the jets and air ways and now it runs spot on thanks guys

the slide is about 1 cm maybe less from the bottom of the bore in the carb and the air filter isnt connected by a big pipe on the carb it is a little pipe on the side edit: ill take some pictures tomorrow im not very good at explaining tbh

on my yb youve got where it connect to the engine but i dont know where the air connect onto but it isnt like a normal carb i can see the throttle slide if i take the casing off where the carb is in with the oil pump i think the air goes onto the carb in the same sort of way as the fuel does my carb also does not have a butterfly valve will take some pictures tomorrow for you

this is the bit that fell out i think i might have put it in different to what it was as it says something about notches which makes it lean out the mixture would that make the bike rev its tits off?

i have a 2 stroke yam yb 100 1988 i took it out for a ride and when i came back the revs was slowly increasing so i had a look at the carb couldnt see anything wrong so put it back together the next day started it seemed ok and idled but this was cold so i took it out but it was sluggish and when i changed down gear i had to keep the revs on and when i stopped had to keep revving it. had another look at the carb and noticed the split pin had come out of the top of the throttle stop rod and was just sitting in the carb bore so i put it back in with a new split pin and made sure it wouldnt come back out now when i start it it revs so high on startup i dont dare leave it on so i turned it off straight away im also wondering if the throttle stop rod is the rod that attaches onto the end of the screw ontop of the carb that makes it idle?

sigh this bike is to much trouble right the revs only sky rocket when the idle screw is turned right in also when i am slowing down and change gear down the bike seems to bog down but after 2 or 1 second the revs are back there

whats the wd40 test can you explain it to me please?

bump anyone?

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hi i have a 1988 yamaha yb100 deluxe it seems to go well through the gears but bogs down in 4th this is about when i change gear 1st to 2nd 10-15 mph 2nd to 3rd 25-30 mph 3rd to 4th 40-42 mph i wondered if that seems right to you im also wondering if it could be the baffle as the owner before me cut it down edit:it also stays at around 42-45 mph in 4th no faster edit: just took the bike out for a 40min run when i come back i notice it is idling high and revs are slowly increasing can anyone help?

i cant find the right tube all i can find is the carb overflow

ok will try this thanks i heard that if your crankseals have gone it makes the bike hard to start but mine starts easily without any choke but takes a second for the revs to respond so i wonder if it is crank seals or running to rich maybe?

only thing with this is that it wasnt smoking when i first got it it just started when i took it for a ride and it got quite hot as i could smell it

are crankseals a big job and will i have to split the crank i have a magneto/flywheel puller?