Topic: MotoGP Werks pipe on Naked Speed

[Tintop]

..... He is running the stepped UP staged primaries like the current F1.

I dig good stuff like that

Are you talking about a pipe that increases in dia. shortly after the exhaust port??  If so that's not 'new' tech, the header on my TC Cortina used that 15+ years ago.

[Don R]

 My drag car has stepped up primaries, then merge collectors. I haven't seen much of that on motorcycle pipes. I like the unpolished stainless pipes too they have a cool grey color.
 I know a header speed secret but if it got out I talked, someone (not me) could lose his job. Probably wouldn't apply to our stuff, high end race only deal. Someday when it's not top secret, I'm going to try it.

[754]

Geeto are you talking. 2" pipes on a late ironhead. Because we used to be able to XLR pipes like the factory put on their early factory racers....a straight pipe..
 Another thing to mention, when headers are mounted on 6 -76 750,s...the pipe generally does not go inside the spigot, like stock. So it must create an anti-reversion ledge.  So what is better 69-76...or 77/78 style..?

[Geeto67]

Geeto are you talking. 2" pipes on a late ironhead. Because we used to be able to XLR pipes like the factory put on their early factory racers....a straight pipe..
 Another thing to mention, when headers are mounted on 6 -76 750,s...the pipe generally does not go inside the spigot, like stock. So it must create an anti-reversion ledge.  So what is better 69-76...or 77/78 style..?

Yeah I was talking the common aftermarket pipes, usually 2" diameter, and usually with big slash or baloney cut ends on them. The XLR and KR factory open race pipes were designed by engineers for racing and are usually longer with a much more shallow cut at the end and also a smaller diameter 1 5/8" I think). If you compare them the xlr/kr pipes also have a much more rounded mandrel bend (similar to a vincent pipe) rather than the squared off bends of a street pipe/aftermarket. Those old factory racing exhausts are a good example of managing exhaust gas velocity in a specific range because most of the bikes they were used on were flat trackers.

[754]

Those pipes have really nice bends on them.
 In the eighties  we sold a lot of 2 inch pipes, everyone wanted the look..but they probably never worked well..

[01Thomas]

And the extra weight of a 4-4 versus a 4-1

I think it is in Kevin Cameron's first book that he mentions Rob Muzzy favorite exhaust for all out power was a 4 into 4 open pipe system.

That was Honda's take with their early race bikes like Hailwood's 500 & the 250/6.  Problem is ground clearance with all those megas stacked up.

[alacrity]

Lossa and Carpy seem to be sourcing the same pipe from the same pipe bender in  ... well I know where it is  but let's just say "Southern California."

Lossa is selling the same thing for a lot more than Carpy.
Just sayin...

[Retro Rocket]

Lossa and Carpy seem to be sourcing the same pipe from the same pipe bender in  ... well I know where it is  but let's just say "Southern California."

Lossa is selling the same thing for a lot more than Carpy.
Just sayin...

Chris makes his pipes in house now, I think if you ask Jay at Lossa you'll find he uses the guy that used to make Chris's early pipes, I think Carpy still uses him too...