what pipes are these?

**Sat May 13, 2006 7:17 am » Post: #1 » Download Post**

these pipes came with my mc21. They were all rusty, just sandblasted them today but there isn't any markings anywhere. Any clue who makes them? the joint connecting them to the long narrow exit must be reconizable.

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**Sat May 13, 2006 7:32 am » Post: #2 » Download Post**

they look like the jha pipes that were on my mc21. so i would say jha make them
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94 mc28 SE

**Sat May 13, 2006 7:35 am » Post: #3 » Download Post**

don't Jha pipes angle up really high?

**Sat May 13, 2006 10:16 am » Post: #4 » Download Post**

only the one on the right when sitting on the bike was high on mine. was long i think thats why so high
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94 mc28 SE

**Sat May 13, 2006 11:48 am » Post: #5 » Download Post**

look like the jha overrev's on my 28
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1995 A kit TZ 250
1994 Rothmans NSR 300sp SOLD
1998 RM 250 freestyle/motorcross
1998 Meathanol burning CR 500 AF super retard/motorcross/sand dunes/play bike

**Sat May 13, 2006 3:41 pm » Post: #6 » Download Post**

thanks
do people generally go down a size or 2 in the main jet with Jha pipes?

**Sat May 13, 2006 9:32 pm » Post: #7 » Download Post**

they look like jhas, same a mine, i had to go up to about a 160 main jet, so i definetly wouldnt go smaller

**Sun May 14, 2006 4:54 am » Post: #8 » Download Post**

Thanks, I should check the jetting on the carbs from that bike.

**Mon May 15, 2006 9:55 am » Post: #9 » Download Post**

Same as my JHA's as well Very Happy

**Mon May 15, 2006 10:42 am » Post: #10 » Download Post**

any feedback on how these pipes perform?
are they a top end pipe?
also is there 2 orings that fit in the flange?
do you use the stock exhaust gasket?

**Fri Jul 21, 2006 8:18 am » Post: #11 » Download Post**

the carbs that came with these pipes have 130/132 main jets.
is that kind of small? 160 seems quite a bit richer.

**Fri Jul 21, 2006 9:31 am » Post: #12 » Download Post**

Sometimes race pipes scavenge better meaning you can run smaller jets, sometimes they don't.

Only insane people presume they will do so in any particular setup.

I believe Steve's had his '18 kicking out 60+ bhp running smaller than std jets and Tyga pipes.
Dave Ett seized his '21 in under 2 miles running Tyga pipes and std jetting.

Start big, 160 sounds fairly safe, 132 does not!
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Last edited by fontyyy on Fri Jul 21, 2006 10:20 pm; edited 1 time in total

**Fri Jul 21, 2006 12:00 pm » Post: #13 » Download Post**

Yup. And I even siezed on 180's up at Croft when it was 12 degrees. My bike seems to flow a helluva lot of air.
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**Fri Jul 21, 2006 12:16 pm » Post: #14 » Download Post**

My '18 is making 63hp with a air box mod, HRC filter, Tyga pipes and 124m/j (thats 2 sizes down from stock).
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If I have to take the carbs off once more...

**Fri Jul 21, 2006 2:51 pm » Post: #15 » Download Post**

StephenRC45 wrote:My '18 is making 63hp with a air box mod, HRC filter, Tyga pipes and 124m/j (thats 2 sizes down from stock).

must be the way it's put together....... Cool

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