Picking a Pipe?

Tyler6357

Well-Known Member
Mar 15, 2012
1,285
288
83
Santa Barbara, CA
Hello everyone. I'm trying to select a nice performance pipe for a new build. It will be a china girl 2 stroke, 69cc, balanced crank and ported. It's going to be direct drive with the possibility for a shift kit later. I'm interested in recommendations. I've been considering these pipes but perhaps you recommend something else?

KTM65--> http://www.ebay.com/itm/FMF-Exhaust...ash=item3f488ff36e:g:EdEAAOSwGYVXBpLh&vxp=mtr

XK65---> http://www.ebay.com/itm/Pro-Circuit...ash=item5428411a0f:g:akEAAOSwUdlWdb0K&vxp=mtr

RM80---> http://www.ebay.com/itm/FMF-Fatty-E...ash=item2c8478b694:g:xbwAAOSwp5JWT-01&vxp=mtr

CR80---> http://www.ebay.com/itm/FMF-FATTY-G...ash=item58dca248b9:g:lGQAAOSwOVpXUiTf&vxp=mtr

KX80---> http://www.ebay.com/itm/KAWASAKI-KX...m45e1890673:m:mmDDMIcytZ2dxMGx5t3PF4Q&vxp=mtr

Are there any major differences between these pipes? What kind of performance can I expect? Which would you choose and why? It's going on a GT2-A frame, will there be any difficulty attaching it to the the bike or the exhaust manifold? I plan on getting a silencer also.
All replies appreciated
Thank you
brnot
 
Last edited:

mike carter 2

Member
Nov 23, 2011
253
13
18
west virgina
i modded a 1979 rm 60 chamber for my bike it has a ported jug ported piston reed valves high compresion head it alone added 15 mile per hour to my top end but i lost some bottom end tork the consences on the web is that the header is to short i ordered a header kit from cr machine to try to make it longer
 

BobbyT

Member
Mar 16, 2014
162
14
18
Santa Maria ca.
Tyler,
I have a KX 85 exhaust You can bring to your MB and see if you want to try and mount it. I have been to busy building engines to fit it to mine.
 

Greg58

Well-Known Member
May 1, 2011
4,533
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Newnan,Georgia U.S.A.
All will have to be modified to fit, the good looking pipes have been cut at the welds and rotated and angles changed to get the proper fit. If they look like the were built for the bike the probably were.
 

Tyler6357

Well-Known Member
Mar 15, 2012
1,285
288
83
Santa Barbara, CA
Greg--I understand about getting a proper fit, however, it's going on a new GT-2 frame with a pedestal mount so I should have plenty of room.