chris66

could the slide be in backwards chris

yes red and white. i think it was a t reg

my first road bike was yamaha ty50 rxs 100 rd250lc honda cb900f rd200dx fzr400 exup yzf750r

i doubt the plugs would make much difference only at one particular rev range, but next time you change them go for the correct ones. i have been using ngk iridium plugs and found they dont seem to fowl up like regular ones and give you a smoother idle. if bought off ebay the are no dearer than shop bought regular ones. my bike was suffering with poor power under 3000 revs, cleaned the idle jets and turned the mixture screws 1/4 in, leaning the mixture out and it runs great again. but dont touch the mixture screws until you have eliminated dirty carbs

i take it you mean two stroke oil. one litre bottle at aprox 40/1 mix should last 40 litres about 8 gallons. if your using half litre bottle of oil then your about right if you mean you are compleatly filling the two stroke container then you are using much to much

your best bet is to try to find someone local with same bike and a big heart to swap cdi to test. sometimes they sell on ebay cheap if its a private listing and not a breakers. my money would be with a faulty cdi

your not kidding i have 1977 70mm red kryptonics on a early 80s blind deck, the wheels cost £28 in 1977 so out of my league back then at age 11, now second hand off ebay they still fetch nearly £100. 33 year old wheels but still the best(until you fall off)

could be some crap thats been sitting in the float bowls has blocked the idle jet on one carb. when it went over it may have stirred it up

well done , now its out you could measure the damper hole and make the tool for future use. cost me about £5 to make and i have used it many times/

to be fair i had passed my 2 part test at 17 in 83. got the 900 in 84, could only touch the floor with tiptoes. my memories of the bike were buckets of torque but heavy as a small car, well it felt that heavy at 18 and 9 stone

when i was eighteen and very skinny i had a honda cb900f . there was a small stretch of grass outside my mothers house you had to ride across to get to the road and one winters day my foot slipped on the mud and it went over. if anyone has had a cb900f they will know that they are not a light machine and i had to leave it over on the mud until i could get enough people to help get it up , by this time the whole street had seen it very embarrassing

there is a special tool, i made one for my fzr 400, out of a 4 foot long 5/8 threaded bar with two 5/8 nuts on each end locked together(4 nuts in total) you undo the top of the forks drain oil take out springs etc and slide the tool down the inside of the fork and it engages with a socket type hole at the bottom. with a spanner on the other end of your tool the allen bolt can be undone.as you try to undo the allen bolt you will feel the tool try to turn, you will need long arms or two people. the only thing you will have to find out is the size of the nuts to use, i am sure some bike are different but all the yamaha ones i have done have been 5/8 s chris

hi and welcome, once you have it running right i suggest putting an inline fuel filter on as its probably just a little rust. the other thing is it probably needs a new battery,or the charging system looked at. good luck chris

mid life crisis isn't restricted to super bikes and fast cars it also includes skateboards(really painful ones)

i seem to remember the fsie fitting a yb100. although it was a long time ago i messed with fizzys and yb 100s. i remember we fitted a yb100 engine in a fizzy frame, that had a expansion chamber on it but i dont remember which bike it was off. ebay is the place, i managed to get one for an old 1983 kh100 last year. any engine oil will do but why not use a little two stroke oil.its only to catch the fine dust in the air. good luck with it chris

my moneys on ogoab, you have it in backwards.

my yzf 750 fans do not come on until about 105 so maybe your bikes fine. on mine the fan sender is on the right front of the radiator as you sit on it so if the fans dont come on after 100 plus then this is probably your problem. i have put a manual switch on as well, so if i find myself in traffic i can switch it on much earlier, but if i forget i still have the sender as backup.

it can be done i raised my fzr400,its the dog bones you are referring to, the longer they are the lower the shock sits.

the fzr400 is a great bike, possibly the best handling bike i have ever ridden. for a 400 they go like a little rocket, they rev to 14000 revs, anything passed 8000 revs and they fly. this was my one the picture was taken in my front garden http://www.bikez.com/motorcycles/yamaha_fzr_400_1989.php

i agree each bike is different when i had a fzr 400 it was a nightmare, couldn't leave it for two months without having to perform some sort of carb clean. i bought some carb additive, you use it in the last but one tank of fuel before putting you bike to bed for the winter, and yes it did work.

the instances on here of engines starting fine after long periods with old fuel are cars. car engines normally have one big carb feeding all cylinders, it would take too much varnish to stop them starting. a bike on the other hand usually has one small carb per cylinder with smaller jets, very easy to block. also most older car engines have not got the fine tolerances bike engines have. my 750 has 123 hp thats more than most 2000 cc cars, the fueling has to be right or it suffers. it sounds like your main jets have been partially blocked by varnish meaning when you rev you trying to run on thin air

i cant help you with volts etc you will need a manual or wait for some kind soul with the same model. i had the very same problem with my fzr, when i took of the regulator/rectifier it was quite obviously burnt out. i got a new one off the net plunged it in, easy as that.if its not burnt then there is a simple test, it would explain it all in a haynes manual. buying a manual pays for its self very quickly. chris

mervin is right, you need to find out if its the engine. try getting up to speed then holding the clutch or finding neutral. if it stops its the engine.

my local shop wont repair bikes over 3 years old in case they snap a bolt or something

i took my yzf 750 to have the carbs cleaned, out of laziness, cost £115. when i got it back it had no power under 3000 revs and the shop would not except it was something they had done. i bought a morgan carbtune for £55 and spent the next 2 hours trying to find out what they had done to cause this problem, it turned out they had set the pilot screws to factory, but my bike is 17 years old and things need to be set diffidently, taking a little care and a lot more time than the dealers can take. they are not mechanics but fitters they fit new parts and adjust them to the book. i found my bike needed the pilot screw turned in on all carbs 1 quarter and i balanced them using my new carbtune tool. the bike now runs perfectly. the bottom line is i wasted £115 and will never take my bike in again. chris