1990 FZR250 misfiring

[Driftmonkey]

Our octane ratings are different to the ones used overseas. Japanese fuels are much higher quality. Hence why most 45hp 250s do not manage to make the 45hp they once did when they come to NZ.
I would run 98, it is more detonation resistant, and with a carboned up 250/4 pulling 18,000rpm, you need the best fuel you can get.

I would not listen to anyone who gives such fucking stupid advice.

Hahahaha, that's so ironic. The only reason I went there is because I know I was talking to someone who worked on bikes all day (assumed they'd give real proper good advice). Back to 98 it is then I guess Cheers for that yamahalover ! Much appreciated

[ducatilover]

Hahahaha, that's so ironic. The only reason I went there is because I know I was talking to someone who worked on bikes all day (assumed they'd give real proper good advice). Back to 98 it is then I guess Cheers for that yamahalover ! Much appreciated

Not all of us mechanics give good advice
Chances are, mine is shit too

[kiwi-on-wheels]

With some of the reports of "advice" given by botany honda, i'm stunned that they are still in business....

[ducatilover]

With some of the reports of "advice" given by botany honda, i'm stunned that they are still in business....

I wouldn't discount them. I have not really heard any other foolish advice from them, so as far as I am concerned it may be a one off and hopefully a bloke having a brain fart

[Driftmonkey]

My next issue has appeared on this terrible bike.. ring gear for the starter. When I turn the bike over sometimes the starter just spins freely without making the typical starter noise you get. I can see the starter motor easily and it's in a fairly accessible place but my question is.. how hard is it to replace and are the parts easy to find? Is it a case of just replacing the starter motor or is it more than that

[bogan]

My next issue has appeared on this terrible bike.. ring gear for the starter. When I turn the bike over sometimes the starter just spins freely without making the typical starter noise you get. I can see the starter motor easily and it's in a fairly accessible place but my question is.. how hard is it to replace and are the parts easy to find? Is it a case of just replacing the starter motor or is it more than that

Sounds like your sprag clutch might be buggered. Easy to replace, pull off engine side cover and a few bolts holding it on to a thing... It generally look just like a gear with two sets of teeth and a bulky inner bit iirc.

[Driftmonkey]

Currently on the hunt for one but... they don't seem to be easy to get a hold of? Do you have any links to a parts store or know of anywhere that could stock one? Or would second hand in good condition be good enough?

[ducatilover]

Yeah will be the sprag clutch. Pull it apart and see what's fucked on it first
I've seen a few smaller bikes get gummed up by using the wrong oil and sometimes a simple wee clean sorts 'em out

[Big Dog]

Currently on the hunt for one but... they don't seem to be easy to get a hold of? Do you have any links to a parts store or know of anywhere that could stock one? Or would second hand in good condition be good enough?

If your local dealer can't help try mrcycles.com.


Stupid phone / Tapatalk, apologies in advance.

[Driftmonkey]

So, gonna get to doing the sprag clutch. Am going to change oil and filter at the same time.. I've read that it's ok to use car 10w30 car oil in bikes as long as the oil doesn't have friction reducing additives otherwise the clutch will slip. Is this correct? I'm going to buy a 10w40 castrol or whatever the first thing I see when I walk into repco is

[Big Dog]

Putting car oil in is a pretty good way to get more mechanical experience but a pretty crappy way to look after your ride.
Stupid cheap auto do a cheap bike oil. But use bike oil.

Engine oil is for engines.
Transmission oil is for transmissions.
Motorcycle oil is for motorcycles.


The important difference being on a motorcycle the same oil is shared by the engine tranny and clutch.

Car motor oil will glaze out your clutch, gum up your transmission and cause it to wear prematurely.
Can also lead to blocked oil pathways inside your engine etc.

Don't do it. Putting car oil in your bike might save you a twenty now but sooner or later it will cost you hundreds if you are lucky. Your bike if you are not.


Stupid phone / Tapatalk, apologies in advance.

[Driftmonkey]

Putting car oil in is a pretty good way to get more mechanical experience but a pretty crappy way to look after your ride.
Stupid cheap auto do a cheap bike oil. But use bike oil.

Engine oil is for engines.
Transmission oil is for transmissions.
Motorcycle oil is for motorcycles.


The important difference being on a motorcycle the same oil is shared by the engine tranny and clutch.

Car motor oil will glaze out your clutch, gum up your transmission and cause it to wear prematurely.
Can also lead to blocked oil pathways inside your engine etc.

Don't do it. Putting car oil in your bike might save you a twenty now but sooner or later it will cost you hundreds if you are lucky. Your bike if you are not.


Stupid phone / Tapatalk, apologies in advance.

Yeah ended up with Castrol Activ 4T but never got around to doing the sprag. Tomorrow morning should be good. Hopefully I can get it sorted..

[ducatilover]

Oil just needs to be JASO MA rated for your clutch. JASO MB should be sweet too

[Driftmonkey]

Pulled engine cover off, found a few gears there... aaand, couldn't see anything out of the ordinary.. no gears were worn, no gears showed any signs of chips/cracks, no metal in the cover or near the cover. Just wiped everything down to give it a bit of a tidy and put back together. Still happens. Just sounds like the starter is spinning freely without grabbing onto anything, then it'll make a tonne of clunking and it'll catch on and then start up.. I need to learn how to play with bikes properly..

[Gadget1]

Pulled engine cover off, found a few gears there... aaand, couldn't see anything out of the ordinary.. no gears were worn, no gears showed any signs of chips/cracks, no metal in the cover or near the cover. Just wiped everything down to give it a bit of a tidy and put back together. Still happens. Just sounds like the starter is spinning freely without grabbing onto anything, then it'll make a tonne of clunking and it'll catch on and then start up.. I need to learn how to play with bikes properly..

Have a look at this to start (no pun intended) with:http://www.dansmc.com/electric_starters.htm

There's plenty of other info on motorcycle repairs on the rest of the site.