New Member New Member 3LN1 FZR250R

1989 Yamaha FZR250R 3LN1 - YouTube


seems to be starting up fine last week or so. put the new fuel filter on today find out of tomorrow if it works

 

so new fuel filter didnt make a difference so far.
had my check ride for my license and it acted up all day, started off with not wanting to start again, then once it fired up heard a clicking noise and found cylinder 2 spark plug lead sparking on the head. had abit of coolant on it.
then rear brake light deciding not to work.
fixed those but still seems to have a high idle issue after running awhile.
the slow walking pace test it was not happy just kept shutting off, had to use another bike and passed it fine.

Local track was having a practice day at a go kart track so had a go at that, first time on a track with a road bike.
ran pretty good for a little while but started to break up abit and not have a lot of power at low revs out of corners which is a new thing. it would be intermittent but eventually just gave up and went home.

so have to pull it apart again. seems like it must still have an air leak from high idle, not sure what else could be going on with the powerloss and stuttering
seems to be leaking abit of coolant out something near the filler neck so think the radiator cap might be abit faulty, looks to be the original one.

cant see much for coil leads any off another bike that will fit?

 

Just put in the throttle slide kit from litetek as i missed that when i ordered the rebuild kit they sell.
Also straightened out the 2 end butterfly valves that were bent.
But now the bikes seems like the throttle is just stuck on. It will idle at 4-8000rpm and if throttle is touched at all itll go up more.
Cable and linkage returns fine but feels a little stiff as it always has.

Kinda at a loss cant see how or whats going on now.

 

thats another thing is not even touching the idle adjuster, for it to touch its nearly maxed out.
it seems to only go back together one way and i have another set of carbies and its in same position.
also got about 2-3mm of slack in the cable Aswell. the linkage part the cable connect too moves freely.

 

first thing i replaced was the boots.

thinking of just getting rid of the bike.

this is everything ive done that i can remember.

Litetek Carby rebuild kit

New Genuine Yamaha Carby to manifold boots

New genuine yamaha airbox to carby boots

emulsion tube and needles

Diaphrams

Litetek Throttle shaft seals
Replaced cracked Airbox with a non cracked one

New Airfilter

Valve clearances

Oil change oil filter

New Battery

Fixed bent throttle butterflies

 

still got the bike, ended up putting later model carbies on. fixed it completely.
Heavier fork oil and rebuilt forks.
new pads all round
new rear master cylinder
new front brembo master cylinder off an RSv4 i think
clutch lever off a triumph lol
fresh Pirelli tyres

been pretty good now starts first go everytime. haven't ridden it as much as i'd like
still having abit of an issue with the leads sparking on the head i'd like to replace the leads and coils to eliminate that becoming worse.
also clutch basket is fairly clunky