I want to upgrade my engine. I have heard that there is a piston upgrade that you can do to the CBR1000F.
What can I do to get more horsepower out of her???
Please help...Thanks alot!!!
I have a 1991 CBR 1000F
kingfisher2@wi.rr.com

 

hi, have u done anything so far to your engine? early cbr,s chuck 130 bhp. how many miles has she done. u could start with k&n, rejetting, better plugs, if u r thinking of pistons ect maybe u might look at holehog rebuild.let me know how many miles ect.i,ll try & help. hope this is ok................ kevvydude

 

sorry forgot to say. im running twin yoshi,s which give another 12 bhp. you can still keep center stand and standard downpipes & collection box. im tryin to find jet size so i can run k&ns,so they run properly....... kevvydude

 

Running full Yosho system and changed the sprocket for more top end.
She gets to about 155MPH.
I have 20k on her. Haven't changed the plugs yet,but what do you suggest?
Am waiting for my K&N its on order.
There is no center stand.
I have heard of a product that you could drop in a new piston and gain another 10-20 horses.
Maybe that was in dream land, who knows. I am not the original owner so I have no Idea if it has a stage kit on it.
I have noticed that during hard accleration that when I let off to shift it pops, maybe getting too much fuel?

 

Sorry, popping on decel is usually too lean

 

The backfire could also be a leaky header gasket at the head. Sucks air and pops unburnt gas on decel.

 

yeha, one of my header bolts fell out, it lleaks a TINY bit there, bike pops on decel... my old chiltons for my CT70 said even a pinhole leak is enough to cause popping... it's true

 

If you follow this link - they do a 1080cc big bore kit

http://www.tts-performance.com/catal...Path=45_46_403