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Post subject: exhausts on a cub
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gnarler  Sunday Rider Joined: 08 Oct 2005 Total posts: 30 Location: bristol |
I am getting to the point in time where i need to sort out some exhausts for my cub project.
Would anyone who anyone running one of these bikes like to give there opinions on pipes they are using, or problems they have had.
The engine is stage II (trinity racing) tuned and i want torque not a crank destroying screamer 
I can mod some of the commercially available pipes for the lc/ypvs to fit myself eg jollys,lomas etc.
Or if anyone could recommend a good fabricator/welder for a custom made set please 
In the meantime here are some of the latest bits going on her...
Carbon/ally side stand...
http://img376.imageshack.us/img376/364/img9293xe4.jpg
Ti swingarm pivot next to OEM one...
http://img376.imageshack.us/img376/9532/dsc00165mw9.jpg
ATB
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Posted: Wed May 28, 2008 6:54 pm
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NORBO RD/RZ Jedi Master Joined: 03 Aug 2003 Total posts: 5495 Location: Nottingham |
The side stand is different .
Any race pipes will be ok i would think. Lomas Nickon and the like .
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Posted: Wed May 28, 2008 7:13 pm
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Picobello Daily Burner Joined: 23 Oct 2007 Total posts: 186 Location: Netherlands |
I'm in the stadium of modifying standard 31K pipes. I have cut the pipes and calculated a new 2 stage baffel.
Teake from the Dutch RD forum has put the measurements of my modified 31K exhaust in Mota (twostroke simulation program) and he saw some unexpected results. Thanks Teake!!!!!
The orange line is a standard 1WT pipe of which they say they have a good midrange power........
The blue line is a custom made pipe made by Fedor Copal which has already better midrange power and top as the standard pipe.
The pink line is my modified 31K pipe.......
http://img377.imageshack.us/img377/7630/pico2fedorstd1wtpijp1wwov3.th.jpg
You want midrange power?????? This is midrange power!!!!
See the difference in horsepower at 7671rpm, almost 5kW per cylinder and at 7000rpm the difference is even bigger! Take also a look at the torque (right side results). Power is over at 9750rpm.
This result makes me SMILE 
I hope it works out the same way in real when the pipes are finised and mounted on the bike.....
This wil cost you little money (piece of steel sheet and pair of RGV muflers or so) and is worth trying.
Good luck.
Pico
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Posted: Wed May 28, 2008 7:57 pm
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| NUTTYNICK |
Gibsons made up a set for Marks 421 Cheetah, perfect fit and nice power/torque
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Posted: Wed May 28, 2008 8:43 pm
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strokersquid Powerband Master Joined: 03 Nov 2004 Total posts: 500 Location: Bay Area Northern California |
ask seb4lo he knows everything about cubs and ypvs's
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Posted: Thu May 29, 2008 1:38 am
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Vindaloobeast Rear-wheel Steering! Joined: 25 Aug 2005 Total posts: 2623 Location: Gloucester |
Pardon me for asking but whats a Cub..? Ive never seen one..can someone PM me a picture please.
Beast.
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Posted: Thu May 29, 2008 7:16 am
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DisqmasterPowerband Master Joined: 31 Aug 2006 Total posts: 857 Location: North East U.K. |
Beast
This should explain things for you
http://homepage.ntlworld.com/ultimatelccrazy/html/Big%20bore%20kits.htm
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Posted: Thu May 29, 2008 7:28 am
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