Page 1 of 1
yms 28mm pipe. whats your opinion? anyone running it?
Posted: Fri Sep 25, 2015 7:41 pm
by 89hatcher
whats your opinion in the yms 28mm? also what rpm does it make peak performance?
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Fri Sep 25, 2015 7:55 pm
by johnny248
Not a good answer, but I *think* I remember that this is a decent midrange pipe, but by no means a "race" pipe. I think that 1man8scoots might have some info on it.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Fri Sep 25, 2015 8:40 pm
by Downsouthdio
Its nice for a contessa or a cast malossi..i think it peaks around 9k ,1man or graphite9 can give more info
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sat Sep 26, 2015 9:46 am
by Wheelman-111
Greetings:
I called it my Hot Surfaces pipe because of the Lawyer Labelling. Anyone who can't anticipate that an exhaust pipe will be dangerously hot shouldn't be operating a motor vehicle. Or scissors. As South said, it peaks around 9K with great torque and near-stock noise levels. It's a good choice for Sport City riding, and durable.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sat Sep 26, 2015 10:39 am
by 1man8scoots
9k is pushing the power ceiling. The 28mm is for 50mm low revving bores, the 26mm is for 72cc low revvers, 30mm is for mini stroker 86cc+ low revvers. They don't fall apart as bad or quickly as a pg. They make a lot of grunt down low then taper off after 8k.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sat Sep 26, 2015 10:40 am
by 1man8scoots
Yms is a good company.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sun Sep 27, 2015 3:36 am
by 89hatcher
1man8scoots wrote:9k is pushing the power ceiling. The 28mm is for 50mm low revving bores, the 26mm is for 72cc low revvers, 30mm is for mini stroker 86cc+ low revvers. They don't fall apart as bad or quickly as a pg. They make a lot of grunt down low then taper off after 8k.
So the 28mm is for the bores smaller than 72cc? And the 26mm is for 72cc-85cc?
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sun Sep 27, 2015 12:29 pm
by 1man8scoots
50mm = 81.25cc.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Mon Sep 28, 2015 1:18 am
by 89hatcher
1man8scoots wrote:50mm = 81.25cc.
Oh i c. Thanks I think I got to grab the 26mm cause I have the 28mm on my 72cc and my top speed so far has been 56mph. Wonder if I put on the 26mm it will make a difference on my top speed.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sat Oct 03, 2015 8:04 pm
by superfast1234
Try changing your gear ratio.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Sat Oct 03, 2015 9:02 pm
by 1man8scoots
superfast1234 wrote:Try changing your gear ratio.
Solid advice there. Top speed is relative to power vs rpm and gearing. If the 26mm gives you more rpms then you will gain speed.
Re: yms 28mm pipe. whats your opinion? anyone running it?
Posted: Tue Oct 06, 2015 3:13 am
by 89hatcher
graphite9 wrote:i would say good pipe for stock bore, or cast. THe contessa seems like more of an aggressive bore vs the cast. You may rev to 9k with that pipe, but I bet your going to see peak power at 6-7500, then losing power 8k, hitting 9k if your lucky. Don't expect high rpm's or power, that being said its probably a great fit for mild builds, and low noise levels.
which pipe would you recommend using that would be able to rev and something that isn't too loud.