Is anyone running ethos pipes on a stsndard mc21se motor?
My problem is I have just that but the jetting is miles rich.
I don't want to bring the jets down to standard in case i should be
running richer with the ethos pipes on. Any advise?
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They're all quick before they nip!!!

So your bike is running rich and you want advise?

Go leaner
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Gee thanks for that fontyyy . What i was actually asking was if anyone was running ethos pipes on a std 21 motor. Some kind of ballpark jetting guide would be appreciated as i don't want to 'go leaner' and have a siezure.
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They're all quick before they nip!!!

lol Don't ride a 2 stoke then

Andys runs ethos, though his engine is far from stock.
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If I have to take the carbs off once more...

I could tell you my jetting, but I don't reckon there are many, if any bikes here that could run it without seizing!

Er, one-seventy-something... try it at your peril!

Just go down 1 size at a time 'till the plugs look the right colour! In my experience, when you think you have the jetting just about right, there's always another couple of sizes you can go down!!
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Andy.
NSR-WORLD.COM

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Cheers guys, begining to understand StevenRC45's signature!
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They're all quick before they nip!!!

Stephen's the worst culprit I reckon!

If it won't take full throttle from like idle to 13k, and not miss a beat in between, then those carbs just HAVE to come off... again!!!

His signature is probably the most appropriate on the Forum! He's the only person I have ever met to run one setting on an outward journey in the afternoon, and another setting on the way back home in the evening!!
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Andy.
NSR-WORLD.COM

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Andy wrote:I could tell you my jetting, but I don't reckon there are many, if any bikes here that could run it without seizing!

Er, one-seventy-something... try it at your peril!

I've just gone down to 180 - 182 with open carbs and it still doesnt feel that crisp.

how low are we talking as I'm on the smallest that come with the HRC kit?
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If you dont like the way that i ride.....Stop trying to keep up!!!!!

Really? I've got down to 170's in the '28 kit and they tend to run 3-4 sizes richer.
Mine would definately end up in them (the 170's) if I jetted it for the track on a hot day.

But take care, cold weather is on the way, sneaking it up a size or two may be prudent
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dont worry fontyyy if it's below 15 degrees I wont even get out of bed.
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If you dont like the way that i ride.....Stop trying to keep up!!!!!

mick wrote:dont worry fontyyy if it's below 15 degrees I wont even get out of bed.

Really ??And there was me thinking you must have used your bike all last winter judging by the dirty state it was in at Llandow I didn't know that it ever get's above 15 degrees tup North

Andy wrote:Stephen's the worst culprit I reckon!

If it won't take full throttle from like idle to 13k, and not miss a beat in between, then those carbs just HAVE to come off... again!!!

His signature is probably the most appropriate on the Forum! He's the only person I have ever met to run one setting on an outward journey in the afternoon, and another setting on the way back home in the evening!!

Yeah but it winds me up to hell if something doesn't carb right. I'm well chuffed with myself that Ive got the F3 to pull clean right off the bottom on wide open throttle, make 70+bhp, start and tick over all on 39mm PWK's

Topic wise though, my stock ish '21 was running 175/175m/j, clip #2, 42 pilots with open carbs and dogfight pipes.
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If I have to take the carbs off once more...