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 Post subject: H2 dyno sheets
PostPosted: Mon Nov 11, 2013 5:10 pm 

Joined: Sun Sep 09, 2012 10:26 am
Posts: 797
Hi gents.

Is there anybody out there having torque/rwhp figures for ported H2's? Preferably those who runs 30-34's, but any curves are appriciated.

Thanks

Jorgen

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison


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 Post subject: Re: H2 dyno sheets
PostPosted: Fri Nov 15, 2013 10:47 am 

Joined: Sun Sep 09, 2012 10:26 am
Posts: 797
The use of search function wea quite informative after typing "dyno".
:mrgreen:
Cant find many 100 rwhp or more with 34's.

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison


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 Post subject: Re: H2 dyno sheets
PostPosted: Fri Nov 15, 2013 11:05 am 
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Joined: Wed Jun 08, 2011 11:34 pm
Posts: 9826
Location: North Central NC
I asked about dyno sheets at Walmart and the lady showed me these:

Image

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 Post subject: Re: H2 dyno sheets
PostPosted: Fri Nov 15, 2013 11:51 am 

Joined: Sun Sep 09, 2012 10:26 am
Posts: 797
Jim wrote:
I asked about dyno sheets at Walmart and the lady showed me these:

Image



:lol: :lol: :lol:

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison


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 Post subject: Re: H2 dyno sheets
PostPosted: Wed Nov 27, 2013 3:44 pm 
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Joined: Thu Aug 11, 2011 2:41 pm
Posts: 140
My H2 with Lush pipes and TMX38's has 100 RWHP@8200 and 96 Nm@6800.
The H2 with VM34's has 84 RWHP with near standard cylinders and Lush pipes.
Will put three H2's on the dyno tomorrow. Will have fresh numbers then.

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 Post subject: Re: H2 dyno sheets
PostPosted: Thu Nov 28, 2013 3:16 am 

Joined: Sun Sep 09, 2012 10:26 am
Posts: 797
Hi Leo.

Can't wait :thumbup:

Best
Jorgen Lund

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison


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 Post subject: Re: H2 dyno sheets
PostPosted: Thu Nov 28, 2013 3:36 am 
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Joined: Thu Jun 09, 2011 3:06 am
Posts: 4364
Location: PARIS FRANCE
jyrgNorway wrote:
Hi Leo.

Can't wait :thumbup:

Best
Jorgen Lund

+1


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 Post subject: Re: H2 dyno sheets
PostPosted: Thu Nov 28, 2013 5:52 am 

Joined: Fri Aug 19, 2011 3:15 am
Posts: 224
Location: Kingdom of the Netherlands
My 1973 H2-A was dynoed on Kawasaki Motors Netherlands' dyno several years ago and produced 66 hp at the rear wheel. Apart from 15-plate clutch and 16-tooth front sprocket it was technically standard, though exhaust internals were less than pristine. Thought I might add this as a baseline.


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 Post subject: Re: H2 dyno sheets
PostPosted: Thu Nov 28, 2013 7:13 am 

Joined: Sun Sep 09, 2012 10:26 am
Posts: 797
Good numbers Gerrit.

I've had stock H2's on my dyno with stock pipes, all from 60rwhp to 67-68 as I have with mine completely stock H2B exept for VM34's.

74 crank hp minus 15% drive line loss is 62,9 hp.


That 60rwhp that I had on my dyno had new honed cylinders, but was running a bit rich. Peak power was at 6400 as far as I remember, not 6800 as it should be.

Best stock cylinders is 81rwhp. That was with VM34 and Jollymoto.

Best stock cylinders, exept for cleaning ports (not changing port times) is 82 rwhp with 34's and Dencoes.

So clean up ports may give a little extra power.

Jorgen

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72 H2, 72 H1B, 74 H2, 74 H2 Cafê Racer, 71 F8 Bison


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 Post subject: Re: H2 dyno sheets
PostPosted: Thu Nov 28, 2013 3:36 pm 
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Joined: Thu Aug 11, 2011 2:41 pm
Posts: 140
Not with three but two H2's we went to the dyno.
German trip[le enthousiast Atze brought his tuned H2:
120 mm pipes, TMX34 flatslides, Reshaped heads, cylinders raised 2 mm, piston cut 3 mm, cylinders decked.
For reference I brought my trackbike, a S3 with 750 engine:
Aluminum liners nikasiled, ex port raised 2 mm, VM34, Lush pipes (105 mm), reshaped heads and pistons.
Atze's bike got upto 89 RWHP, my trackbike 100 RWHP:

Image

So here you have your H2 with 100 HP with VM34!
It was good fun this morning!

Cheers

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