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View Full Version : Changing Keihin cab to mikuni on 85 250r



mallardoak
11-22-2022, 01:29 PM
Long story short couldn’t get the keihin to stop overflowing ,so I bought a striker 38 carb off of eBay and never got it in . Seller still claims it was on back order, so I called sudco and they told me I couldn’t get stock keihin carb and that all I could get get was a mikuni 34 mm. Question is I’m not familiar with Mikuni will I have to change throttle cable ,their both round slide and what jet sizes do I need to start out with . bike is stock I’ve tried to order two keihin carbs with no luck just trying to get back riding.

MrConcdid
11-22-2022, 02:49 PM
I'm sorry, I cant answer your question, but I can recommend www.223cycles.net for all your future carb needs.
MrC.

shortline10
11-22-2022, 05:29 PM
I would not run a mikuni , a lot harder to jet .
A keihin 34-38mm with a 170 main and your good to go , sometimes you have to play with the needle but way easier than trying to dial in a mikuni .
Here is a 35mm in stock at a decent price .

https://www.ebay.com/itm/284397531268?hash=item423769f084:g:YisAAOSwrTRfRTK I&amdata=enc%3AAQAHAAAAoJNXBoj%2BJB4WXkVlc%2F5Q0rj8y %2BAJjboy66wEVgn36wXzmpHOYKIfwwPykCH1w3l6HhP5AjylJ r31Ve3Ig4DV3BSSlQyr0x6JkRn0l6q%2BW8QKgSlGbqP0vGR2u atLwGHABd%2Fb3x8F59e6e5EsMDaFvvDb3Cnb9XH9qIqcdL32h r%2BrXxfubynJvxRXtPhRFEsjY1Tu2AXC9p3pz05u9GR2LNQ%3 D%7Ctkp%3ABk9SR7bX1pOUYQ

atc300r
11-22-2022, 07:29 PM
I'm using a Mikuni TMX 38 from a 01 cr 250r. I rejetted it and put a S-7 emulsion tube in it works great on my 83 250r.

christph
11-23-2022, 03:05 AM
I have had Keihin and Mikuni carbs on my R. Generally, I'd say the Keihins are easier to tune--more of a set and forget carb. The Mikunis can be temperamental. You could get a new 34 mm Keihin oval slide from Sudco, the kind that came stock on the 86 250R. If you are looking to go bigger, a 38mm, I'd recommend the Keihin PWK first and then the Mikuni TMX. I currently have a 38 TMX on my 86. I'd stay away from the Mikuni TM. There is only one machine I've gotten it to work halfway decent on.

mallardoak
11-23-2022, 10:15 AM
Thanks I’ll try and send this mikuni back to sudco and get a Keihin . I thought I’d ask here about opinions before I put it on. Didn’t know anything about Mikuni carbs

mallardoak
11-23-2022, 10:18 AM
I’ll have to try eBay again Sudco doesn’t have any Keihin carbs at all for the r

Red Rider
11-23-2022, 02:07 PM
I’ll have to try eBay again Sudco doesn’t have any Keihin carbs at all for the rA lot of eBay sellers will sell you a carb, then have it shipped to you directly from Sudco. So if Sudco is out of stock, then so is the seller. Try contacting the seller before purchasing to make sure they actually have it in stock.

christph
11-24-2022, 10:11 PM
Beware cheap Keihins on ebay--they are Chinese knock-offs.

mallardoak
11-27-2022, 07:51 PM
Got my 35 mm pwk Stryker in. What throttle cable do I need , mine is the one with the top built on it. Do I need to start with 170 main like short line suggested. Thanks