1996 XR400 CDI fitted to XR650

Hello. I have a stock, but uncorked 2003 XR650r. I am interested in using the cdi unit from the 96-97 xr400 to add a little more low RPM torque. I am not concerned about the over rev the xr400 cdi will provide so long as the engine will not over rev to a point which causes internal failure. I am not a engine rever type rider. I know when to shift. I have read that this unit has 2 degrees advance more than the stock XR650r cdi unit and the same advance at high RPM as the XR650r cdi unit. I have a few questions for those that have done this mod.

1.) Will 2 degrees advance provide a noticeable enough torque increase to feel it? I am sensitive to engine response changes.

2.) Will 2 degree ignition advance cause pinging on regular pump gas? Right now i live at 5600' and ride up to 12,000' but also plan to ride this bike at see level.

3.) Is this the correct number marked on the pre smog 96-97 xr400 cdi "070000-2650? or is it 070000-2740?

Mods; If this post is in the wrong forum please move it to the correct forum and message me a link to its new location.

I swapped mine over to the 400 CDI some years back and I do think she performs better al low speeds etc, I am like you a slow low RPM rider....must be old like me ?

Mauser thanks for the reply. Do you still have the bike and the 96-97 XR400 cdi unit? If so would you be willing to verify which is the correct number i posted above. It can be found on the sticker attached to the CDI unit.

Found the answer to my question and found a used 2650 cdi on eBay.

http://www.honda-xr650r.com/swapping-an-xr400r-cdi/

Yes still got my bike just got back from short ride, I used the same CDI as mentioned in the link....can take seat off if your desperate lol....

Thanks Mauser. No need to check your cdi. The info in the link is very clear about the part number.