power fluctuation

hey thanks ron for the tips for getting my batavus up and running--this forum is by far the best I found. still have a few questions:

will the little rectangular paper acordian $3 car filter(4"x2"x1") i stuck on be ok for the laura m 56 engine?--it is not enclosed in any kind of box (how do i know if it is running to hot, or getting the right mix? i drove about 12 miles today and it seems fine)

it runs much better but why would it consistently hesitate/accelerate--hesitate/accelerate from 0-10mph--but work great after that?

...and finally, this may be a stupid question but is a functioning choke necessary? My choke cable has nothing to connect to at the top end but it starts ok.

Thanks alot!!

Re: power fluctuation (Choke?)

Wayne Broderick /

Are you saying that the engine revs up and down, until it's warmed up? if so, it sounds (to me) like the choke might have something to do with it.

Re: power fluctuation (Choke?)

actually it sort of doesn't accelerate smoothly but in jumps even after the engine is warmed up but only when I accelrate from from stop to about 1/4-1/3 throttle--then it runs smooth.

Re: power fluctuation (Choke?)

Maybe your carb isn`t tuned??

Re: power fluctuation

Ron Brown /

Eric,

I don't remember what I said in my previous post so bear with me.

You need to try running without the filter to determine if it makes a difference. While you have it removed, you can look at the choke on the carb intake, it is just a shutter which blocks the air intake and should be in the wide open position when off.

Check Fred's "How to fix your moped" under resources for how to do a plug chop. This is the best way to determine mixture.

Also, make sure your clutch is clean and operating correctly.

Ron

Re: power fluctuation

thanks --I'll take apart the clutch and clean it. as far as the choke goes--the carb on this bat is for the m-56 engine--there is no shutter--the choke is a sliding valve with two rubber rings--when pulled by the cable it seems to allow gas to enter into the intake via tiny holes that i think lead to the float tank. thats what i gathered at least from looking at it--it is normally in the off position blocking the little holes.

I put on this small paper car filter with less restrictive air flow and aside from the power flux from 0-1/4 throttle it runs good. I would like to do a plug chop but the spark plug doesnt have a ceramic part on it to "read"--its all metal(threads, etc)

suggestions?

Re: power fluctuation

also when i take the clutch apart to clean--what should i look for to see if it is working properly? should i grease it when im finished?

Re: power fluctuation

Ron Brown /

Eric,

You do not seem to want to run without the air cleaner. Is this because you had this surging problem before you installed it. If not, why won't you take it off again?

The choke sounds ok, but the fact that you can start from cold without it indicates that you are probably running too rich.

The part of the spark plug surrounding the center electrode is ceramic.

Only lube the clutch bearings, the friction surfaces should be clean and grease free.

Ron

Re: power fluctuation

ok ron--i used all my will power and forced myself to remove the air filter and it doesnt hesitate as much--or at all when it is warmed up--it accelerates faster from a stop too without it, though it still runs ok with it on----but...it rides great for about 20-30min(7or8 miles), then starts to lose power when i am at a high throttle, and jerks as the motor seems to cut of and on--after i slow down, it will accelerate again but then has the same problem when i speed up again--it does this to same degree with air filter off--at one point started making a whistling or quiet squealing sound but went away quickly. rode high throttle for as long as I could and did a plug chop--it was a light tan--some parts very light--some parts darker. tips? ideas? suggestions? thanks for everyones help so far.

Re: power fluctuation

ok ron--i removed the air filter and it doesnt hesitate as much--or at all when it is warmed up--it accelerates faster from a stop too without it, though it still runs ok with it on----but...it rides great for about 20-30min(7or8 miles), then starts to lose power when i am at a high throttle, and jerks as the motor seems to cut of and on--after i slow down, it will accelerate again but then has the same problem when i speed up again--it does this to same degree with air filter off--at one point started making a whistling or quiet squealing sound but went away quickly. rode high throttle for as long as I could and did a plug chop--it was a light tan--some parts very light--some parts darker. tips? ideas? suggestions? thanks for everyones help so far.

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