My 1st MIKUNI HSR-45 - NEED HELP GUYS

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Apr 4, 2012 | 12:30 PM

krazn8

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From: texas

My 1st MIKUNI HSR-45 - NEED HELP GUYS

Okay so I have a TC88B - w/95" BBK - Ported Heads - Large Valves - Big Cams - From DUNN PERFORMANCE in CO. - yada-yada-yada - I DIG the build....

Anyways I got the a NEW Mikuni HSR45 off eBAY - Right away I notice the Fuel Bowl screws are loose so the wrench monkey that I am decides to investigate and to my NOT so surprised eyes I see that the Float Needle Valve Assembly is missing. Ok fine so I go online and start searching for one. To my surprised eyes I find 4 options. Here is where I need your help guys. All you FI guys stay home!

I see Mikuni offers 4 options in sizes (2.3/3.5/4.2/4.5)
Which one do I get?!?!

Here is a list of the Jets I have...

MAIN (170/175/180) 175 installed
Pilot (not sure what size it is)

Thanks a bunch in advance guys!!

Last edited by krazn8; Apr 4, 2012 at 12:39 PM.

Apr 5, 2012 | 11:20 AM

jetmech74

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From: Emory,TX

4.2 is standard/stock size for the HSR 45. That carb maybe a little on the large size for your combo, unless you're running a lot of compression, cam and have some major port work done.

Apr 7, 2012 | 10:24 AM

krazn8

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From: texas

Quote:

Originally Posted by jetmech74

4.2 is standard/stock size for the HSR 45. That carb maybe a little on the large size for your combo, unless you're running a lot of compression, cam and have some major port work done.

Thanks - Yes I do have a Large cam and major port work done but the Compression is low 9.8:1 - I'll see how it goes - thanks for the input!