Hi all. I have a Malaguti Yesterday that I believe was kitted to 70cc (bought it on Craigslist). I've had the scooter almost a year now, and have seen a couple of things happen over time:
- I used to be able to hit 50, even 55, on straightaways. Now however getting too speedy, the acceleration will completely drop off over 40 or so.
- Going down hills particularly shows off the engine drop-off. Once I'm over about 35mph going down a hill, the acceleration can completely drop off, and sometimes I need to wait until the bottom of the hill to get it going again.
- I think I've also found that cold/humid days cause more drop-off than hot/dry ones.
I'm regularly replacing the spark plugs now, as that seemed to help the problem, but they are getting less and less effective. A new sparkplug might only help the problem for a week or two at best, and then it begins it's slump downward.
Any ideas? I'm relatively new to engines and engine care, so any help would be appreciated.
Thanks all,
ML
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