The same has actually happened on a full HRC TT-F3 we ran a few years ago. One of the wires on the NiCad connecter broke away inside its connector, and the bike barely limped back to the pit. The F3 uses the same small flywheel and stator as the RS250R NF5, but absolutely does need the battery pack.
If you find it works for you, that's great, but we always recommend using the battery, just as for the majority we say keep the oil pump. Unless you're the fastest of the fast, and really need all the bells and whistles, the OEM setup is really very good, and so eaily optimised.
My MC21 with the standard charging system (lightened flywheel), standard PGM-III (with wire splice), 2T pump, stock compression & porting, with slightly reshaped transfers, matched to the cases, and our crankcase work, HRC kitted carbs with Ramair foam filters, makes a little over 66rwhp. It launched faster than the full HRC F3 (on the same HRC gearing), but would then lose out in 4th/5th/6th as the greater HP of the F3 overcame it. Hard to better the OEM setup though.
I can sort of understand the simplification of the setup for some, particularly if they've come from less sophisticated bikes previously, but I think it often leads to far more questions than it warrants.
Someone will always come along and contradict the above, but I only speak from personal experience. Additionally, I am unsure if you are aware of our credentials here, but aside from the NSR250Rs, we also ran six NSR500V NX6s for several years, each utilising PGM-IIIs, and I can state categorically, they will not run without a battery pack.
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Andy.
NSR-WORLD.COM
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