Is it my sparkplugs? Or carb?

[ducatilover]

start basic, as already said, tank breather and plug heat. good luck

[jaymzw]

I had the same issues as poster 1 on my FZR, then it eventually stopped and wouldnt start at all, The issue was the valves were getting all clogged up woth carbon. Took it to a mechanic friend, who cleaned the valves all out, and while he was at it did the rings and a hole heap of other stuff. Could be something like that.
For me it was a pig to start, wouldnt rev through the full range sometimes, and would ride along fine for a while then sound as though it had dropped a cylinder or was losing fuel, and turned out to be valves. After the rebuild it did actually drop a valve altogether. hopefully its not as serious for you!!

How many k's had your FZR done?

My CBR has done 40,000 but i dont think it has EVER been looked after.

I'm thinking of trying as many basic things as it could be but may just end up selling it and putting the rest of the money into my project bike and a small car

[The Pastor]

mate ive a bit of experiance with the cbr 250 mc22, and have a bit of spare time today (friday) or sunday and monday... we could have a go at it together if you want? im in glenfield

[The Pastor]

How many k's had your FZR done?

My CBR has done 40,000 but i dont think it has EVER been looked after.

I'm thinking of trying as many basic things as it could be but may just end up selling it and putting the rest of the money into my project bike and a small car

edit: double post

[jaymzw]

edit: double post

Thanks PM sent

[Moki]

1. make sure valves look good and a adjusted correctly
2. check fuel filter for blockages
3. clean out carb bowls and check float levels
4. balance carbs

Symptoms sound like cold starting circuit on the carbs gets the bike started and then fuel starvation afters. Fuel filter not allowing adequate fuel flow as all carbs are affected?

[jaymzw]

So after spending an afternoon on the bike with RM, i believe the problem may have been fixed, checked all spark plugs, they were fine, checked breather, no problem.

Ended up cleaning some gunk out of the carbs with carb cleaner. Took it for a quick run up the motorway without issue, and the top-end seemed a little better. Hopefully no more trouble at 100km/hr.

Thanks RM i owe you a box

[The Pastor]

just let us know how it goes _b glad i could be of help mate.

[DarkLord]

Which carb cleaner did you use Jaymz, and where can you get it?

[The Pastor]

just the carb cleaner from supercheap auto, they only sell one

[gunrunner]

Okay,

So im having an annoying time with my CBR at the moment and it seems the cheap thousand dollar CBR is finally catching up with me.

SOOOO anyway, when i start up my bike in the mornings. If she dies,She wont start again straight away unless i push start. Also in the mornings after starting, If I rev her up she seems to be unable to get past 6-8thousand revs for awhile? All is well when i am commuting around town (80% of the time) but once riding for maybe 5-10kms at 100k's plus, the bike seems to change sound (dropping a valve???) and will gradually lose power until eventually dieing. It will then start again in about 5 mins of me leaving it.

All these stupid problems seem to me to be related. However im not sure what it could be. Is it my Sparkplugs (i think this to be likely) or possibly my Carb?

Or alternatively i ride my bike to the scrap yard tommorow and go buy a Morris Minor?

Any help/abuse/HTFU comments appreciated...

JW

Pull the plugs and have a look , too much stop starting around town will clog them up . Take it for a decent run

[tigertim20]

How many k's had your FZR done?

My CBR has done 40,000 but i dont think it has EVER been looked after.

I'm thinking of trying as many basic things as it could be but may just end up selling it and putting the rest of the money into my project bike and a small car

My FZR had done 37000km at that point