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Mikuni HSR carby
https://www.ausmini.com/forums/viewtopic.php?f=2&t=88874		 Page 1 of 1
Author:  drmini in aust [ Sat Mar 14, 2015 5:55 pm ]
Post subject:  Mikuni HSR carby
I spent a little time today helping tune Gafmo's Mikuni HSR45? carby on his (was once mine)1412 stroker.
Pretty simple to tune, compared to an SU or Weber. Just an idle mixture screw, idle jet, a needle and a main jet.
I put the A/F meter on, and we went for a thrash.
Main problem was, it was going too lean at full throttle with the biggest main jet they can supply (a 220, = 2.20mm diameter). And midrange was a little rich.
I drilled a spare main jet out to 2.40mm, we dropped the needle by a notch, and VROOOOMM!! Numbers now good, it hauls ass, and sounds great too. 8)
http://www.mikunipower.com/Catalog/Miku ... g36-01.htm
Author:  Diesel27 [ Sat Mar 14, 2015 6:30 pm ]
Post subject:  Re: Mikuni HSR carby
genius
Author:  MG Rocket [ Sun Mar 15, 2015 8:46 am ]
Post subject:  Re: Mikuni HSR carby
GR should try out one of these on the dyno, see how it goes.
Author:  drmini in aust [ Sun Mar 15, 2015 9:56 am ]
Post subject:  Re: Mikuni HSR carby
Throttle response is better than an SU, sounds better too. But it doesn't sound like a pair of Harleys (as a Weber or Dellorto does). :)
Author:  simon k [ Mon Mar 16, 2015 8:28 am ]
Post subject:  Re: Mikuni HSR carby
what accelerator pump adjustment does it have?
Author:  drmini in aust [ Mon Mar 16, 2015 9:28 am ]
Post subject:  Re: Mikuni HSR carby
simon k wrote:
what accelerator pump adjustment does it have?


http://www.mikuni.com/pdf/hsr_tuningmanual_021003.pdf
See p6 & p7.
Author:  simon k [ Tue Mar 17, 2015 2:59 pm ]
Post subject:  Re: Mikuni HSR carby
cool - one of the main problems when using a supercharger is the lack of a "proper" accelerator pump
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