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Discussion Starter #1
I want to rebuild the Keihen carb on on 87 EVO.
Looking at the service manual this shouldn't be to hard.
Looking for a rebuild kit with gaskets, slow jet and main jets.
I'm going to put in an Andrews cam, probalby 26 or 31.
Don't know if I will bore the cyclinders out .030 over yet till I pull
it apart. Looking on Ebay most kits are for 88- 99
wondering if they will work.
any help with advice or part numbers, place to buy kits would help.
 

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Ironbutt
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7,415 Posts
Red02FXST said:
I want to rebuild the Keihen carb on on 87 EVO.
Looking at the service manual this shouldn't be to hard.
Looking for a rebuild kit with gaskets, slow jet and main jets.
I'm going to put in an Andrews cam, probalby 26 or 31.
Don't know if I will bore the cyclinders out .030 over yet till I pull
it apart. Looking on Ebay most kits are for 88- 99
wondering if they will work.
any help with advice or part numbers, place to buy kits would help.
Have you thought about replacing it with a late model CV carb? You can usually pick them up on Ebay for around $50. Just a suggestions.
 

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I've never checked on ebay but the Keihn butterfly carb was used on big twins all the way thru 1989. The sportster got a Keihn CV carb starting in 1988 and the big twins got the 1st one in 1990. Maybe that's where the confusion is.

I'll 2nd what "miles to go" said. Find a 1990 or later CV carb and replace the stock manifold with compliance fittings and stock carb with the later stuff. You also would have to replace the cables.

This looks like the kit you are looking for.

LOOK HERE
 

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Ed Y said:
I've never checked on ebay but the Keihn butterfly carb was used on big twins all the way thru 1989. The sportster got a Keihn CV carb starting in 1988 and the big twins got the 1st one in 1990. Maybe that's where the confusion is.

I'll 2nd what "miles to go" said. Find a 1990 or later CV carb and replace the stock manifold with compliance fittings and stock carb with the later stuff. You also would have to replace the cables.

This looks like the kit you are looking for.

LOOK HERE
@gree:
Ditto,shitcan that 38 and get a CV40,I did the conversion on my '84 FXR and it was great.
The solid manifold also gets rid of those pesky rubber compliance fittings that crack and cause intake leaks.
 

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Discussion Starter #5
ED Y and Y2K.
Both of you thank you for the help. I don't want to upgrade to
a 90 or new carb and replace cables. I think I can just rebuild the carb
for less than $50. Bike already runs okay, but don't think carb was
ever rebuilt or taken apart and cleaned.
How do I tell between the Japan and Taiwan carburators?
 

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Well, your loss if you don't want to upgrade to a 40MM CV.

Can't help you with the difference in "where made". I'm sure you could find a link to Keihn and probably get your answer. Does the HD service manual talk about that aspect of the carb??
 

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Ironbutt
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You talk about changing cam and bore but you don't want to change the carb? :huh: IMO you are taking two steps forward and one step back. Bike will run much stronger with a CV40.
 

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Discussion Starter #8
miles to go said:
You talk about changing cam and bore but you don't want to change the carb? :huh: IMO you are taking two steps forward and one step back. Bike will run much stronger with a CV40.
Thank you for your opinion. Well taken. Just don't want to buy
the 40 mm now and all the cables along with doing the cam and
cylinders. It more a budget issue... I'm doing all the labor myself.
Rebuilding the carb is the easy part.. If it doesn't run well later on
I can get the 40mm CV.
No the service manual doesn't show diffence in Japanese or Taiwan.
I just didn't know there was a difference. One learns every day.
this is good information you all bring up and all is well taken advice.
Thanks,
Kenny
 
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