HONDA RS250 stator, ECU,big Cabs on NSR250...MC28

**Fri Feb 03, 2006 2:36 am » Post: #1 » Download Post**

Who has it on your NSR250? One of my friend's NSR250 just done with it, I was told the NSR250 MC28 is going unbelieveable fast? I just very curious how the engine works? any opinion?
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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine

**Fri Feb 03, 2006 3:00 am » Post: #2 » Download Post**

This is basically a semi F3 conversion and is gonna be something that StephenRC45 will be trying.

The RS rotor will allow the engine to spin up faster 'cos less weight on the crank. The RS PGMII obviously gives good timing with no restrictions, but depending on year maybe need retarding for unleaded fuel.

The big carbs have been done by many and give good top end power, especially on a 'built' mota.

You'd be looking at 70+ ponies.

**Fri Feb 03, 2006 4:32 am » Post: #3 » Download Post**

what year RS carbs should be used on a 28?
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1994 NSR250SE

**Fri Feb 03, 2006 4:33 am » Post: #4 » Download Post**

Would a 92 RS250 carbs work on MC21 ?

**Fri Feb 03, 2006 6:49 am » Post: #5 » Download Post**

Any carbs will work, but you'll just have to put in the hours to set them up.

I've used 91, 92, 96 RS250 carbs. I've also tried a pair of CR500 carbs. Don't expect CR500 jetting to work though!

**Fri Feb 03, 2006 8:09 am » Post: #6 » Download Post**

Cool! So if you use a rs250 stator then you'll lose your lights right ?

**Fri Feb 03, 2006 11:46 am » Post: #7 » Download Post**

You will also need to strip your motor and re-mechine where the stator sits as it wont fit on stock nsr crank cases.
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If I have to take the carbs off once more...

**Fri Feb 03, 2006 8:20 pm » Post: #8 » Download Post**

I was thinking of alternative carbs this morning. Having worked with Scott V on his RS carbs I can see why they would be a great addition to a track bike even if they didn't add any power. They are so easy to work on.

Since RS carbs are quite hard to find, can CR carbs fit. How could you join two together?

**Fri Feb 03, 2006 8:36 pm » Post: #9 » Download Post**

You use 2 cables, just like the RS does. CR500 carb is 38mm the same as the RS.
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If I have to take the carbs off once more...

**Fri Feb 03, 2006 11:32 pm » Post: #10 » Download Post**

So I can use 2 CR500 CR carbs mounted on RS carb boots (if I can find those!)?

**Fri Feb 03, 2006 11:41 pm » Post: #11 » Download Post**

Yes
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If I have to take the carbs off once more...

**Sat Feb 04, 2006 3:12 am » Post: #12 » Download Post**

So...what is F3 conversion? and which year model RS250 Stator,ECU, CAbs has the best performance?
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1996 HONDA RS250
1995 MC28 NSR250 SE red/white/green
1994 MC28 NSR250 sp W/ RS250 engine

**Sat Feb 04, 2006 1:41 pm » Post: #13 » Download Post**

Sorry to hijack your thread Hung, but can anyone tell me the part numbers for the '92 RS250 carb boots.....Scott, Maxim?

Where's the best to get em?

**Sat Feb 04, 2006 3:29 pm » Post: #14 » Download Post**

Carb "insulators" for the '91: #16210-NF5-710 (front); 16220-NF5-710 (rear).

not sure if that helps given you're after the '92 numbers, but maybe a bit. Confused

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-Jim
'93 MC21

**Sat Feb 04, 2006 3:33 pm » Post: #15 » Download Post**

Mine are 1991 Tom, and no longer available... Sad

They are actually made from Hens Teeth.
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NSR300R - Why did i ever have a 250...