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Old 02-19-2019, 03:08 PM   #161 (permalink)
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Firefly EV - '98 Pontiac Firefly EV
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Just tested mine with a timing light...the timing mark barely moved as I revved it up. Disappointing, and a bit inconclusive. Might have gained like 5 degrees, between idle and probably 6 to 8k rpm.

On the other hand, I also had my tach light out, which I used to set the idle yesterday...hit 11,500 rpm quickly, before I chickened out. That's good...wasn't sure it would do much past the 8k limit the old CDI box.

Self-advancing timing would be nice...lack there of might explain the need for 1500rpm idle?

Edit: I take that back; after thinking about it, I think it appeared to be retarding slightly, which I attribute to the timing light having trouble keeping up. Meaning it is fixed.

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Old 02-20-2019, 03:35 PM   #162 (permalink)
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Thanks for taking the time to check.
I made a half hearted attempt to remove the Lifan rotor today, the lack of a flywheel holding tool prevented further progress, but both rotors look identical.

I'm waiting on a clutch cable to make the bike rideable then I'll be able to swap the parts over and make a direct comparison of performance.

I'll keep you informed on progress, it would be useful to know whether it makes a worthwhile difference. The Honda engine has a mechanical advance/retard and will tick over nicely at 1100 rpm, if I can achieve that with the Lifan I'll be happy.

11,500 rpm. is impressive, please be careful, I don't want you throwing a rod an my account. A tiny-tach is now on my shopping list!.

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Old 02-21-2019, 11:35 AM   #163 (permalink)
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I wouldn't want to run it that high for more than a moment, but I doubt it'll bother the rod. Now the rings, on the other hand...I figure they're what was wrong with the motor that came in the bike that this one is going in to. The 2-speed auto means it was absolutely screaming much over 50km/hr. Seemed to run fine once you got it wound up, but sucked in low and mid range. And the oil got dirty in a hurry. I assumed low compression. Could be a burnt valve, but that wouldn't get the oil dirty in a hurry. Anyway, for that reason, I won't be making this one scream needlessly.

Tach sounds like a great idea! (Or just running the stock CDI with its 8k limit)
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Old 02-24-2019, 02:33 PM   #164 (permalink)
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Quote:
Originally Posted by Ironside View Post
The wee beastie is almost finished. I say 'almost' because I don't think it will ever be completely finished, projects like this tend to continually evolve.

I'm wondering if the recumbent position affects your body input to steering. You sit far lower, and it would seem that you would need to body lean far more to achieve the same effect on the bike.
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Old 02-26-2019, 02:48 PM   #165 (permalink)
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Quote:
I'm wondering if the recumbent position affects your body input to steering. You sit far lower, and it would seem that you would need to body lean far more to achieve the same effect on the bike.
Body lean doesn't really come into it, I could be strapped in bucket seat and it wouldn't make a difference. It's all done with counter steering, every biker uses it whether they are aware of it or not. Hanging off the bike is useful at extreme angles of lean on a racetrack, but makes little difference in normal day to day riding.

Having said that, I do tend to sit upright rather than 'laid back' at very low speeds, body lean under these circumstances makes for good balance and better maneuverability.

Pete.

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