ericbloodaxe

does anybody know if an fzr600 head or cams will fit directly onto or into an fzr400r both 1989 bikes.......... thought i may have a play as the damn thing is still playing up and i'm taking it all to bits cheers bloodaxe

that is my next test to do at the weekend.......... got tot the point don't care what the problem is just what to get the damned thing fixed.....lol

what has been done so far......... fuel tank cleaned.all fuel filters cleaned..petrol pump check and all ok run with air box split to view carbs still the same.new airbox rubbers fitted no change replaced carbs with a good set off a running bike.my old ones are on my mates and are fine. still no change checked that manifold rubber are ok.......... they hold a good vacuum on inlet no air leakage check thro' electrical system coils generator.. all to spec....new plugs and plug caps fitted new regulator fitted new battery fitted remove thermostat to check to see if it opens at correct temp run engine from cold and revs freely till the temp gets up remove air box when fault occurs.revs freely when no load road test with airbox of struggles to get above 5k.but i'm guessing thats a mixture prob with no airbox on so can you think of anything else i've missed

latest update........... put it all back together......... without the airbox...and went for a spinn.upto 4k revs it's fine the thats your lot under load..guess to be expected do to the mixture being screwed with no airbox....... on the paddock stand it will rev freely with no load on the engine..... but hey ho......... i think i'll buy a 600 engine and stuff it in......be more fun lol still the mystery continues............. wonder if a dose of C4 would help it.......

yes i thought i cracked it when i found thre feul pump would not push fuel to the cards under pressure...this has now been cured and the tank...fuel tap filter and pump are alll fine and in good working order......... the carbs are in good working order as they are off a good working bike and he is running on my original set with no problems.......... so to as why mine will not run with the air box attached is just a mystery..... and removing the balance screws will make it run though not properly with the airbox on and the airbox off ..and off it goes this is the strangest thing i've ever come across in 30 years of biking and i've had some odd-balls....lol

indeed lol............ right then......how about this........... keep the airbox on...remove the balancing screws...... and that brings it back to life well nearly life the revs pick up a bit slower but it does rev... and i get throttle responce.... god damn thing i just about give up with the damn thing.....lol wish i'd never sold my TL1000S......didn't handle but never let me down..lmao

Hmmmm..... i not sure about that as at the moment the tank is at the side of the bike and the fuel feed pipe is clear of everything so i can't envisage that is the problem..but i will have a look .......

lmao.......... i know it's not the carbs as i have a set off a good running bike which came straight off one bike and on th mine and still the same problem occurs i did say it's a strange problem...........

no full tank of fresh fuel tried it on prime and reserve............. filters are clean so is petrol tank...... first thing i checked...... it's very odd... all the pick up coil etc are fine....being a sparks they've been tested hot and cold .... it's just very wierd had bikes for the last 30 years and cured all of them except this one...... i'm just wondering going off at a tangent that the stat is stuck closed and the engine is over heating causing mixture probs...i'll take it out tomorrow and see what happens. try anything once lol

ok i'm stuck........ my FZR400R circa 1989 keeps dying when the engine gets hot with no throttle responce.it's fine when cold a runs fine till the temp gets high then it dies....... best explanation i can give is that it gets starved of air when hot.. remove the air filter and cover still no joy....remove the complete air box and hey presto it burst into life .... so far i have check valve clearences .. all ok... ensured fuel pump is fine...... tried a set of carbs of a running bike to check mixtures etc...and still not resolution to the prob. checked inlet manifold rubbers .. ok... so i'm totally stuck don't know what to try next. so any help much appreciated