92-93 RM250 Technical Carb Issue - Motorcycle-Journal Forums

digipoi · 09-17-2004, 01:53 AM

Are the carbs interchangeable?

Have a 93 RM250 thats not too happy with its carburetor. A friend gave me a decent carb off a 92 RM250. Is it possible to replace the 93 with a 92? Whats the pros/cons of doing this? And is it even possible?

Appreciate any feedback! Thanks!

Dave2122 · 09-18-2004, 01:06 AM

If they are the same model carb then yes you can change them. All you would need to change the Main jets, needle, air screw etc. The reason you need to change all the pieces over is due to the jetting always being changed year in and year out.

digipoi · 09-18-2004, 02:22 AM

They are two different carb types, ones a Keihin and ones a Mikuni. Figured out they are indeed changeable because they are both 38mm I believe. Though, the 93 carb (Keihin) seems to be the better choice. Jettings not the problem, its whether the performance will lack between the two types. Whats the difference and if anyones done this before.

Dave2122 · 09-18-2004, 11:22 PM

I am sure you can get either one to work just fine. I am partial to the Mikuni's as I have more experiance with them. My 02 RM250 has a Keihin 38mm on it and it seems to work well.

09-17-2004, 01:53 AM	#1 (permalink)
digipoi Seat Tester Joined: Sep 2004 Location: Honolulu Posts: 84	92-93 RM250 Technical Carb Issue Are the carbs interchangeable? Have a 93 RM250 thats not too happy with its carburetor. A friend gave me a decent carb off a 92 RM250. Is it possible to replace the 93 with a 92? Whats the pros/cons of doing this? And is it even possible? Appreciate any feedback! Thanks! __________________ 2004 RM250 2004 DRZ125L 2006 TTR-90E 2004 JR50 1993 RM250 1990 KDX200

09-18-2004, 02:22 AM	#3 (permalink)
digipoi Seat Tester Joined: Sep 2004 Location: Honolulu Posts: 84	They are two different carb types, ones a Keihin and ones a Mikuni. Figured out they are indeed changeable because they are both 38mm I believe. Though, the 93 carb (Keihin) seems to be the better choice. Jettings not the problem, its whether the performance will lack between the two types. Whats the difference and if anyones done this before. __________________ 2004 RM250 2004 DRZ125L 2006 TTR-90E 2004 JR50 1993 RM250 1990 KDX200

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09-18-2004, 01:06 AM	#2 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	If they are the same model carb then yes you can change them. All you would need to change the Main jets, needle, air screw etc. The reason you need to change all the pieces over is due to the jetting always being changed year in and year out.

09-18-2004, 11:22 PM	#4 (permalink)
Dave2122 Sprocket Pilot Joined: Sep 2004 Bike: Which one of the 9? Location: USA Posts: 887	I am sure you can get either one to work just fine. I am partial to the Mikuni's as I have more experiance with them. My 02 RM250 has a Keihin 38mm on it and it seems to work well.

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