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Old 08-03-2010, 04:42 PM   #1 (permalink)
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1986 Evo Carb Change

I have a 1986 Heritage Softail Classic with 26000 miles on it. I have been having some idling, carb and exhaust back firing issues I am looking at changing it out for a Mikuni setup. Has any one had any experiences whit mikuni on the older Evo engines. What bore of carb should i be looking at, Mikuni offers a 42mm and a 45mm kit.
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Old 08-03-2010, 05:12 PM   #2 (permalink)
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There are also good deals to be had on 40mm Mikuni carbs as well. The 40 and 42mm will work just fine with almost all stock or mild engines.
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Old 08-03-2010, 05:37 PM   #3 (permalink)
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hi coulpla things

Quote:
Originally Posted by HD Rider AB View Post
I have a 1986 Heritage Softail Classic with 26000 miles on it. I have been having some idling, carb and exhaust back firing issues I am looking at changing it out for a Mikuni setup. Has any one had any experiences whit mikuni on the older Evo engines. What bore of carb should i be looking at, Mikuni offers a 42mm and a 45mm kit.
for personal reasons only, i hate to admit it, but u simply can not go
wrong with a mick. new is best, used is okay provided now one has hurt the adjustment seats, u know cranked down to hard etc etc. we ran the micks in the early 70,s for example when they first got kinda used for r&R. they rocked then and now, they are more refined and really honk. smooth, good mpg and ten other reasons. its just a fact. they WORK good period.. bias has nothing to do with u.or anyone else who runs them. my deal only. hope this helps in anyway. lupe
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Old 08-03-2010, 08:41 PM   #4 (permalink)
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The 42 MM carb is the one you want.

I have a 40mm on my `89, but they have been out of production for many years, the 42 is a much better unit all around.

You will feel a big improvement in performance by going to a Mikuni 42. Very easy to tune, and they come with a good owners manual.
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Old 08-03-2010, 09:59 PM   #5 (permalink)
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hsr42 is best for an 80"
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Old 08-03-2010, 10:50 PM   #6 (permalink)
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Thanks, guys! I have a local dealer that can get me a screaming deal on a new Mikuni 42. Now to find a choke cable that will mount back in the stock location.
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Old 08-04-2010, 07:13 AM   #7 (permalink)
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Now to find a choke cable that will mount back in the stock location.
You can just relocate the choke cable over to the left side like the later model bikes, and use a mount stud and nut like the later model softails (early `90s) to secure the dash panel. It`s a cleaner look not having the choke knob on the dash.
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Old 08-04-2010, 10:25 AM   #8 (permalink)
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Quote:
Originally Posted by Dan89FLSTC View Post
You can just relocate the choke cable over to the left side like the later model bikes, and use a mount stud and nut like the later model softails (early `90s) to secure the dash panel. It`s a cleaner look not having the choke knob on the dash.
Yes it does give it a cleaner look but I like the look of the choke knob on the dash. It give a unique look that not many bikes here in Canada have.
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Old 08-04-2010, 08:38 PM   #9 (permalink)
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I have a 87 fxstc with S.E. Head, Stock pistons, S.E. Ign, Mikuni HSR42 and i love it i got rid of my S&S super E because my local MOCO said they would only work on Mikunis and at the time i didnt know enough to do it myself. I just got it back today from a indie shop. They installed 10.5/1 S.E. Pistons .10 over, and replace the ev27 with a ev59 so that should light some of those TC buddies of up.....Anyways I love my mikuni!
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