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Old 03-08-2013, 07:14 PM   #16
boxerboy81
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Quote:
Originally Posted by darmahman View Post
just ordered a new set from Keihan...
So, the natural progression of this discussion leads us to chatting about increasing main jet size and adding a K&N air filter. Do you know what you've started? JC suggest a 170 mj and the filter change.

http://www.bmbikes.org.uk/Forum/view...p?f=15&t=10793

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Old 03-08-2013, 07:44 PM   #17
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Being at 5000 feet and most of my riding is in the mountains at 6000-7500 ft. I will probably wait and see, eh?
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Old 03-08-2013, 08:51 PM   #18
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Free flowing exhaust? Leaner mains is very often what they actually need. That and richer needle jets.
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Old 03-09-2013, 05:41 AM   #19
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Jim Cray Cost?

Curious, but how much shipped to the US? Thanks..
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Old 03-09-2013, 07:32 AM   #20
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Hello Mr Mosiman

Thanks for the email, prices as follows:

1 Pair 38mm “Jim Cray” Silencers £272.76
1 Set 38mm Twin Balance Exhaust Pipes £193.20
1 Pair Silencer Mounting Brackets £ 13.26
2 Off Silencer Clamps £ 12.30
Freight to USA £ 85.00

All items in stock at the moment

Best Regards
Beryl Chodynicki

fyi - $861 US dollars











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Curious, but how much shipped to the US? Thanks..
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Old 03-09-2013, 08:16 AM   #21
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If that was a Staintune quote, there'd be no change from $2K. Bargain really.
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Old 03-09-2013, 10:23 AM   #22
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Agreed but I doubt it has the quality.


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If that was a Staintune quote, there'd be no change from $2K. Bargain really.
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Old 03-09-2013, 10:51 AM   #23
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I've watched those videos of your 1000 times before, thanx!

I noticed the Staintune seems to have a larger outlet than the Keihin. Did you notice that as well? The Staintune seems a little deeper in tone at idle.

The polish on the Staintune seems a little better than the Keihin.

I have the Keihin Mufflers, H-pipe, and I am getting ready to do the Headpipes.
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Old 03-09-2013, 11:41 PM   #24
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I've watched those videos of your 1000 times before, thanx! Cheers

I noticed the Staintune seems to have a larger outlet than the Keihin. Did you notice that as well? No, I didn't unfortunately, nor did I measure them. I sold the stock Keihans so can't do that comparo. The Staintune exhaust has a 32.2mm diameter. The Staintune seems a little deeper in tone at idle.

The polish on the Staintune seems a little better than the Keihin. Yep, but the Keihans are ok. They do get some discolouration in the area under the foot, but that polishes out ok.



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Old 03-10-2013, 01:20 AM   #25
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I just measured my Keihins, they are 28.25mm
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Old 03-18-2013, 03:47 PM   #26
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Jim Crays

Just received and installed the "Jim Crays" from Keihan. Took a week to receive from England. 2 pics. By the way - They sound is wicked yet they can be toned down enough thru neighborhoods to be acceptable. But a great bark when you get on them. Will need to rejet tho. Opening is 42 mm



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Old 03-18-2013, 03:55 PM   #27
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You got yourself a serious dose of awesome there!

If you stumble across a video camera...
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Old 03-18-2013, 03:59 PM   #28
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Just received and installed the "Jim Crays" from Armour. Took a week to receive from England. 2 pics. By the way - They sound is wicked yet they can be toned down enough thru neighborhoods to be acceptable. But a great bark when you get on them. Will need to rejet tho. Opening is 40.5 mm



This is a copy of Jim Cray's dynochart for his silencers on a twin plugged 100/7. Not just extra noise, but real power as well!

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Old 03-18-2013, 06:24 PM   #29
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Originally Posted by darmahman View Post
Just received and installed the "Jim Crays" from Armour. Took a week to receive from England. 2 pics. By the way - They sound is wicked yet they can be toned down enough thru neighborhoods to be acceptable. But a great bark when you get on them. Will need to rejet tho. Opening is 42 mm
I've heard them compared to a BSA Goldstar and even a WW2 Spitfire. The Goldstar I believed, the Spitfire I wasn't too sure about!

I'm gonna put mine back on next oil filter change!

The openings: fwiw...anyone help with some measurements?
Zuena stock 32mm
Stock Keihan 28.25mm
Staintune touring 32.2mm
Staintune Sports 36mm
Keihan Jim Crays 42mm

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Old 03-18-2013, 08:11 PM   #30
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We are not being very Beemerish by having loud exhausts...

I just measured my Zuena stock with caliper - 32 mm
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