Heymow - Lawnmower Racing Forum

Engine Help => Kohler Engines => Topic started by: truckintyler on October 23, 2019, 09:31:08 pm

Title: 42mm Mikuni HSR
Post by: truckintyler on October 23, 2019, 09:31:08 pm

Would a single 42mm Mikuni HSR flat slide be ok or too big for a command twin 44ci with a cam and port job?
 Or would two smaller flat slides like Keihin fcr be best . Not sure which direction to take .

Title: Re: 42mm Mikuni HSR
Post by: cycloneracer on November 22, 2019, 05:52:33 pm

The engine that Zach Kerber built me had 2 42MM mikunis on it.   I think he sells a kit with the intakes and carbs.   Check his website out.

Title: Re: 42mm Mikuni HSR
Post by: Michaelgc7 on December 06, 2019, 01:04:02 am

What would the port work be like? Also what rpms? Cam?

Title: Re: 42mm Mikuni HSR
Post by: truckintyler on December 11, 2019, 04:25:11 pm

just ordered the MWSC 6000 cast cam kit , rods and flat top pistons , rpms ?- this is my first open engine 6000-7500 rpm ?.
 Head work -- pretty much will be an amateur job just cleaning up the ports ,  nothing like the port work you do micheal.
 

Title: Re: 42mm Mikuni HSR
Post by: Michaelgc7 on December 13, 2019, 09:04:54 pm

In that case the carb is more than likely going to be way too big. Try a 36 or a 38 instead. 36 would probably be perfect