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Old 01 February 2007, 07:52   #1
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Boyesen reeds

Has anyone fitted Boyesen reeds to their O/B

http://www.boyesen.com/article/articleview/40/1/22

They claim a few hundred RPM extra and smoother idling etc. I know they fit them to the Tohatsu's on the ZapCats so they must do something.

My engine is maxing out at 5100RPM (WOT range is 5100 to 5800), so my question is - will these reeds give another 100RPM? If so, it's worth it!

Thanks,
Al.
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Old 01 February 2007, 09:36   #2
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I doubt it, one of the main reasons they were fitted to the Zapcat engines was for engine safety rather than adding HP or speed. They do far less damage if they brake off whist running at high revs.
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Old 03 February 2007, 18:43   #3
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This company made reeds for the Yamaha RD 350 LC Motorbike before they were the YPVS many years ago. they did improve performance as I recall.

However getting it to go was never the problem much for the RD, it was getting it to stop!!!!!!!
Long time ago.......
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Old 04 February 2007, 02:52   #4
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Old 04 February 2007, 03:01   #5
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Old 04 February 2007, 03:02   #6
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Quote:
Originally Posted by yoyo View Post
However getting it to go was never the problem much for the RD, it was getting it to stop!!!!!!!
Long time ago.......
Ah...happy days. Rember them well!
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Old 04 February 2007, 04:18   #7
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Oh yes with those coffin tanks and rear sets ,I remember every spare penny spent trying to get that extra mph and noise eeeeerrrrrr
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Old 06 February 2007, 10:40   #8
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two stage fiber, NO reed stops, have seen a 500rpm gain, this may or my not
work on your hull.
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Old 06 February 2007, 17:25   #9
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Yes Yoyo,

I recall having a burn with two YPVS and one RD doing side saddle on way from COrk to Dublin. Yep side saddled at 80 MPH when I heard whine! Whine! as these bikes passed by.
I straightened up and own on tank and wound her on.......I had honda 500/4 with Yoshimura 4 to one and Gas flowd head.. gave it all till Oil light came on..
had to pull back and let the fancy boys go ahead. We had a 20 mile spin, could not do it now, I am too heavy and the bikles are long gone.

Getting old dude, still hate Harleys tho...
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Old 16 February 2007, 20:24   #10
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boyesen reeds

Well they did and still do improve 2 stroke bikes as they claim , modern 2 stroke comp bikes still use them , and the 2 stage reed I have heard works very well . I thinks they are made of carbon fibre these days .
If your old reeds are tired then worth fitting i expect .
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