748 racing topend
 

will a racing top end fit onto my standard 748 bottom end, i expect a few of you have seen it on ebay for sale it was from dan ankers 748rs

will it need any extra servicing work if fitted and what extra work would be required to fit, any info welcome

im not a technical expert just looking for that little bit of extra power to keep up with my mates cbr's and sp2's

cheers


deej

Consider an 853 upgrade?

http://www.sigmaperformance.com/748-853.html

Depends what year the RS is, and what year yours is as to whether it's bolt directly on, but I doubt they'd fit straight on as the RS is a later engine than the one you have.

You'd also want the HiComp R / SP pistons in there as well and a complete re-map to account for the larger valves / cams

Oh, and you should have the cams dialled in as well.

Give Nelly at Cornerspeed, or Steve at MotoRapido a call and see what they say.

think it could be the 853 kit money depending

if the wife gets the job shes going for it will defiently be the 853 kit !!!

Wotcha,

The main problem will be the injectors wont fit without having the heads machined, the R and RS heads have a step to space the injectors together and the bp or sps ones wont go on (nor will the inlet rubbers)

The other point is that although the 748RS cams are mega, but they are VERY hard on valves/collets/rockers and belts.

The RS cams make much more power but only at high revs , 8k+, this feels great to ride but will make you want to keep the revs hanging on in each gear and you will find the rev limiter feels lower! this is not a good idea on the standard conrods and crank.

your service bill WILL go up. RS cams and valves are designed to be replaced every 700 - 1000 kilometers.

The best option is without doubt an 853 kit with hi compression pistons, SP cams (if you can find some) and an adjustable chip. 916 power and 748 pick up and revs.


good luck.

Hello chap, 'bout time you signed up and started posting.

wotcha matey,

try to keep a low profile here, but just sent my £25 and joined up so thought i'd chip in! full of advice me!:sing:

and want to come an play on track days with you guys, need the track time!

ha ha hope not.
I've seen that vid at cadwell where you tried taking out that pore slow person up the inside
:D

cool, Brands Indy's the next one, but I'm not going :(

Got to pick up her ladyship and the little one from the airport that day....

Welcome Wilf - you may as well get behind the bar and get serving then :D

Double whiskey thanks chap :D

And one question (call it ignorance, I'm going to play the Australian ignorance card) but what's all this 'wotcha' stuff?