pocket bike pipe mod

tokarev · 12-10-2007, 09:37 AM

Last night we modified my sons pocket bike pipe - had to reshape radius around the head - split the expansion chamber and moved the front cone foward. Added 2 1/2 inches to the center. This goes along with a bunch of other engine mods he did. Hope it works OK - the engine that is.

HardlyDangerous · 12-10-2007, 09:40 AM

Keep in mind you will need to re-jet it for the pipe change

tokarev · 12-10-2007, 09:45 AM

Yea he's planned this pretty well as far as what he needs - he bought a few different ones (jets) just in case. Try to fire it up this afternoon.

HardlyDangerous · 12-17-2007, 08:39 PM

What was his goal /reason for doing this pipe mod?

My understanding of the exspansion chamber function is a larger chamber provides more low-mid range power and less top end.
Will this work with or against his porting becase most of these engines are ported for top end only?

12-10-2007, 09:37 AM	#1
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	pocket bike pipe mod Last night we modified my sons pocket bike pipe - had to reshape radius around the head - split the expansion chamber and moved the front cone foward. Added 2 1/2 inches to the center. This goes along with a bunch of other engine mods he did. Hope it works OK - the engine that is.
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12-10-2007, 09:40 AM	#2
HardlyDangerous Join Date: Nov 2007 Location: Ontario canada Posts: 47	Keep in mind you will need to re-jet it for the pipe change __________________ HARDLY DANGEROUS MOTOSPORTS
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12-10-2007, 09:45 AM	#3
tokarev Join Date: Sep 2007 Location: Safety Harbor Florida USA Posts: 214	rejetting Yea he's planned this pretty well as far as what he needs - he bought a few different ones (jets) just in case. Try to fire it up this afternoon.
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12-17-2007, 08:39 PM	#4
HardlyDangerous Join Date: Nov 2007 Location: Ontario canada Posts: 47	What was his goal /reason for doing this pipe mod? My understanding of the exspansion chamber function is a larger chamber provides more low-mid range power and less top end. Will this work with or against his porting becase most of these engines are ported for top end only? __________________ HARDLY DANGEROUS MOTOSPORTS
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