kit exhausts

[kwackman12]

OK who outbid me? If i'm correct these were kit exhausts http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=180478291212&ssPageName=STRK:MEWAX:IT Was it you Mr jordan?
_________________
KR1-S C3 300CC Stan Stevens Conversion
KR1 250B2 Track bike
Aprilia RS250
Yamaha 2010 R1

[mj43]

Nope sorry - didn't see them. was going for the barrels and as usual forgot about them

[KR-1R]

These race exhaust pipes as a pair weight only 5.1kg. A pair of Genuine Kawasaki KR1S road exhaust pipes weight 10.8kg

yeah missing that does suck - they were no longer correct F3 mufflers so dont feel so bad

I'll go home tonight and weigh a clean standard set
_________________
[]
|| [ ]
(.)(.) B1,C2,C3A,D1

[kwackman12]

[scooble]

I saw them too, I assumed that they were swarbrick

[KR-1R]

KR-1S exhaust weight confirmed

Expansion Chamber = 4.2 kg (getting lighter by the day)
Muffler OEM = 1.15 kg (1.2) = 10.7 kg pair
_________________
[]
|| [ ]
(.)(.) B1,C2,C3A,D1

[mgtkr1]

where these pipes defenitly (spelling) kit jobbies?? wonder if there a decent improvent overe std oher than weight or like rgv kit stuff they will only be real effective in tandem withall the other kit stuff? ignition,barrels,carbs ect

[kwackman12]

[KR-1R]

.
.
I didnt know what they (F3 kit chambers) looked like either until a KR-1R came up on Yahoo last year with them on.

dimensionally they look much the same as standies, maybe more care paid to some of the seams.
They probably came out B era as the C was beginning construction - so are what the C pipes were based around. (cost of tooling)

They do have identical flattened outside faces for ground clearance/cornering (cant see in this view though)


obviously thin sheet construction as cracking repair indicate

like most race bikes and motorcrossers they have spring retainers to the cylinder and the muffler for quick maintenance


I have never cut a standard pipe open (although I have had a pair from an SP that I had X-rayed due to some unusal plugs welded onto the lower header region).
I Could not determine if the construction is double skinned or not.
I had this pair HPC (ceramic) coated on the outside, and have been sitting around dry (chemically dipped) and empty - now somewhere on the inside is corroding - loosing large chunks (rust) material.
This suggest the header bend is thick gauge single, and the belly is double skinned - I think some folks here have had pipes gutted before.

The kit pipes like a MX chamber would be 18/19 gauge sheet (1.2, 1.0mm or thinner), single skin construction - hence why they are approximately half the weight. 5kg is a large advantage - anyone got weights of Lomas/Gibsons/Nikons etc?

[i]Yes a pipe will affect tune - Pipe manufacturers products (ProCircuit, FMF etc) all claim power advantages over standard, as realised this maybe only 1 to 4hp, enough to blow a motor? If it was running on the very limits of tune to start with.
_________________
[]
|| [ ]
(.)(.) B1,C2,C3A,D1

[mj43]