XR 650R 04 dallara backfires!!!

Hello to everyone I own this pig (uncorked from factory) and I put a akrapovic slip on, since then when I am closing the throtle at every gear it starts bang boom!@###$@!#%%$%: any suggestions

Hello to everyone I own this pig (uncorked from factory) and I put a akrapovic slip on, since then when I am closing the throtle at every gear it starts bang boom!@###$@!#%%$%: any suggestions

Sounds too lean. A rejet is in order.

The bike is thirsty, a rejet is most correctly in order.........:cool:

so if I go from a #175 main to a #178 and from 65 to a 68s it should do some work?

What's the temperature and altitude? Airboxmod /aftermarket airfilter?

Last year,I mounted a complete Akra line on a XR650R and did the airbox mod with Twin Air free-flow airfilterset, I had the best power with a 70 S and a 188 main (sea level , 15° C),with just the slip-on a 68S and a 180/182 will do I think (sea level).

It should help but may need more fiddling.

Putting in the pilot is the start you then need to find out the setting on the fuel screw.

start at about 2 turns out.

A hard running 4 stroke should burble on decel not try and explode

No airboxmod, 30C Sea level!.......sould I do the airboxmod? There is so much dust here in Greece when u go enduro!

It's a HRC recommendation. :cool:

What's the temperature and altitude? Airboxmod /aftermarket airfilter?

Last year,I mounted a complete Akra line on a XR650R and did the airbox mod with Twin Air free-flow airfilterset, I had the best power with a 70 S and a 188 main (sea level , 15° C),with just the slip-on a 68S and a 180/182 will do I think (sea level).

I am getting some popping on decel also... can you tell me the honda part number of those jets? I could only find the 68s and the 175.

By the way, is there any HRC needle kit? If so, can anyone tell me the part number.

Thanks for the info

Regards

A small amount of popping or a small burble is good.

Screw your pilot screw out a little if it's popping too much.

#178 99113 GHB 1780

#180 99113 GHB 1780

www.cmsnl.com

Dallara XR are jected for the "corked exhaust", if you install a "open" exhaust you better reject it.

I think people in Italy installed a 175 or 178.

Check on www.xr-italia.com, you may register and ask question.

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