Ok,my son bought a srx 700 wants to big bore it.I did hauck kit on mine.Told him to do cpr or hauck.His fried tells him that he will get same horse power from factory tripple pipes or after market ,unless he spins motr at 10,000 rpm's.he wants to know how true this is.I told him I never ran mine with factory pipes.What do you think he should do.How big would the horse power difference be.
Junior
New member
your post is kind of difficult to understand.
what brand of pipes does he have on it at the moment?
there's no way you're going to make power with any pipe I have ever seen at 10,000rpm on a stock CDI box
what brand of pipes does he have on it at the moment?
there's no way you're going to make power with any pipe I have ever seen at 10,000rpm on a stock CDI box
he has stock srx tripple pipes now.
wants to put big bore on there and keep stock pipes and cdi.
wants to put big bore on there and keep stock pipes and cdi.
Junior
New member
OOoooooo I understand
the bender bigbore pipes make more power with bigbores, that's the only ones I know of that make more power, but I haven't done a whole lot of experimenting with pipes on bigbores.
he sure won't have to rev to 10,000, the stock CDI box starts rolling back the timing at 8500, a rev limiter of sorts.
the bender bigbore pipes make more power with bigbores, that's the only ones I know of that make more power, but I haven't done a whole lot of experimenting with pipes on bigbores.
he sure won't have to rev to 10,000, the stock CDI box starts rolling back the timing at 8500, a rev limiter of sorts.
*99sRx700*
New member
you have a PM 780
ya, it works
Sure, you can run the stock pipes and cdi with a 780, just keep the porting in line and not too much compression and they work good. If you want a king of the hill, take no crap 780, then your gonna need a set of bender big bore pipes and a set of bored carbs(or 38mm mach z carbs), and some compression and good port timing, I would also say a aftermarket cdi box.
What happens is with a healthy big bore, your gonna fill up the stock pipe more, with fewer pulses coming back to the cylinder, now add alot more compression, and what happens is the pipes will peak at a way lower rpm then when they were on a stock 700, this will show on a dyno at 7800-8000rpm, peak hp numbers, anything past that and its decreasing rapidly per hundred rpm intervals. This also applies to a race ported 700,more compression,etc. been there dun that already.
Sure, you can run the stock pipes and cdi with a 780, just keep the porting in line and not too much compression and they work good. If you want a king of the hill, take no crap 780, then your gonna need a set of bender big bore pipes and a set of bored carbs(or 38mm mach z carbs), and some compression and good port timing, I would also say a aftermarket cdi box.
What happens is with a healthy big bore, your gonna fill up the stock pipe more, with fewer pulses coming back to the cylinder, now add alot more compression, and what happens is the pipes will peak at a way lower rpm then when they were on a stock 700, this will show on a dyno at 7800-8000rpm, peak hp numbers, anything past that and its decreasing rapidly per hundred rpm intervals. This also applies to a race ported 700,more compression,etc. been there dun that already.