748 exhaust suggestions
 

Im looking to replace my stock 45mm system and termi cans for a complete system(preferably Ti) . Any suggestions as to what size would suit? 50mm or 54mm? the bike was recently set up with a pc3 and the dyno operator suggested bigger pipes, so any thoughts/experience of putting a similar system on a 748 would be welcomed....cheers

Assuming we are talking about a standard 748 I think 50mm is as big as you can reasonably go - and even then seem to recall being told that depending on the individual bike some respond better than others to this and some bikes are best left at 45mm. Bigger systems will need a new EPROM and the fuelling set up to suit and again this introduces a new set of variables and not everyone has reported positive experiences on this. When I fitted 50mm Ti end cans it took three chips to find one that suited - in fact the first one I had made the bike appreciably worse. Also seem to recall previous threads cautioning about suitability of 50mm - and especially larger than 50mm - systems on standard 748. Having said that if yours has been dyno'd you may be in a better position to judge.

any other thoughts anyone?

45mm on 748

50mm on 748R

Both sound good, 50mm just a bit louder.

Mines on 50mm, haven't had any bother with it, just need to change my gearing to squeeze some more power!!!

JJ

I had a full 50mm system on my bike , now have a full 54mm system, must admit i prefer the 54 but i have done a few things to the bike....!

Saying that the 50mm system was also good, the SP made 105 RWHP on the dyno with that system, a pc3 and a couple of other bits.

So i`d say, as others have, depends on how much you have done/going to do to the bike, both good.

My system may also be for sale soon if you are interested.

Cheers

Gav

Gav, what other mods have you made?

my 748SP made 100HP with 50's
they came as standard on the SP's but they also came with hot cams and stronger conrods.
I would not think it would be worth going larger than 50mm on a 748.
and they will be more available.
I sold mine for around 500 when I went to a 54 on the 996
all depends how much you want to spend.
but if money is no object then get a bigger engine and start on that

JJ

That could take a while to list.....
Really quite a few now.... lets just say the only original parts of the SP left, are the two crankcase halves and some internals in the bottom half!

If you want to get in touch u2u me and i will give you my number.

Gav

I've got 50mm carbon Termis with a JHP chip on my '99 748 Bip. Fantastic combination, no problems - highly recommended!

(buy some earplugs!)

Stinkwheel