alright guys n girls
im new on this site need a little help with my bike
cbr 600 f3 1996
she been sat 4 a while as ive resrpayed the panels and done some cleaning up.
took her out 2day and she wont rev past 4000 rev in any gear except 1st,
struggles to get past 40 but after about 15 mins will struggle to get past 30, as it hits these speeds or revs it bobs the bike violently, carbs have been cleaned its been serviced recently with new spark plugs as well.
any help would be muchly appreciated

thanks

 

Id start by finding out if its running on all cylinders. Sounds like you may be missing some or at least intermittently.

 

Since the bike has been sitting for so long, i'm assuming you've put fresh fuel into the bike and checked the airfilters, and filter housing to make sure you dont have a family of mice living in there?
When the carbs were cleaned, did you check all the jets and make sure they cleaned and open?
Have the carbs been synced recently?
Ensure there's no blockage in the fuel flow, ie: rust, dead bugs, etc...
If all those check out well and it's getting good fuel, then i'd start checking the spark side of life.
stator, wires, etc..

 

Anytime I have a bike that has not been running for a long period, I go all the way down to the bones..

My build thread may help you with some other things to check



https://cbrforum.com/forum/cbr-600f2...-build-132852/

 

also check your ram air hose routing. If they are not on there correctly that is exactly what it will do. Just mention this because you said you cleaned carbs and also had the fairings off. there are many threads for the correct routing in the f3 forum section. This is where I would start trouble shooting first

 

Could I interest you in a cat?

 

right cheers for the tips guys
quick update checked pipes dont seem to be any blockages all air pipes seem to be in the right place.
i havent checked the jets to c if they are opening they where cleaned tho whend the carbs where,
also when the bikes on the paddock stand it will rev all the way to 14000 in every gear with out any problem

 

I am putting money on the carbs. Unless they were stripped down and chem-dipped, there is a good possibility that they are still gunked up. I would also check the fuel tap and straws in the tank.

 

+1 for what jveach said.