Hard time on hills

1978 batavus m56... struggles on small hills. Where should I start for making repairs and/or adjustments? Thanks

Re: Hard time on hills

Sounds normal.

Re: Hard time on hills

I don’t think it’s normal, my other moped goes up small hills just fine. I’m talking really non-steep hills. My moped goes from 25 mph to like 1 mph lol. I’m wondering if I need to adjust the idle screw or something.

Re: Hard time on hills

Idle screw would do nothing for your problem.

It sounds like you may have low compression. Possibly a bad seal, or maybe just an airleak someplace.

Re: Hard time on hills

Ah ok thanks

Re: Hard time on hills

Or , it may just be jetted slightly 'wrong' .

Re: Hard time on hills

Dirty30 Dillon /

I would 100% put it down to two things: worn bore/rings, or clogged exhaust.

Re: Hard time on hills

I wondered about that. I’ll start by unclogging you my exhaust . Thank you

Re: Hard time on hills

Overpriced Parts /

What TopSpeed do you get on the straightaways?

Re: Hard time on hills

generally around 23-25mph

Re: Hard time on hills

Overpriced Parts /

> Tiff Bailey Wrote:

> -------------------------------------------------------

> generally around 23-25mph

Is your bike a 25mph model or 30 mph model

Re: Hard time on hills

ALWAYS go ahead and gap and replace a spark plug. Keep the old one in the tool bag.

But it could be clogged exhaust like said earlier.

Re: Hard time on hills

Hey Don thanks. I’ve got a new correctly gapped spark plug in there now, it didn’t run at all until I did that. So now I’m just troubleshooting. I’ve got good compression, spark and the carb was all cleaned recently. I think it very well could be exhaust or a jetting issue. I very much appreciate everyone’s ideas!

Re: Hard time on hills

Dave Thacker /

Compression and if that is good think about adding some teeth to the rear sprocket.

Re: Hard time on hills

Ok good idea

Re: Hard time on hills

Adding teeth to your sprocket will make the bike faster on the top speed but will affect your ability to go up hils even more and slow down the take off as well.

Re: Hard time on hills

> Jay Rivett Wrote:

> -------------------------------------------------------

> Adding teeth to your sprocket will make the bike faster on the top speed

> but will affect your ability to go up hils even more and slow down the

> take off as well.

Quote: Dave Thacker /crafted

Sep 15, 2020 08:29PM

Compression and if that is good think about adding some teeth to the rear sprocket.

;) (edited)

Re: Hard time on hills

Great info, thank you all!

Re: Hard time on hills

Are you sure it isn't the 20mph model? Did you check?

Re: Hard time on hills

> Tiff Bailey Wrote:

> -------------------------------------------------------

> Hey Don thanks. I’ve got a new correctly gapped spark plug in there now,

> it didn’t run at all until I did that. So now I’m just troubleshooting.

> I’ve got good compression, spark and the carb was all cleaned recently.

> I think it very well could be exhaust or a jetting issue. I very much

> appreciate everyone’s ideas!

Yes, there's a whole crew of people here to help. That's what has always been great about MA.

Re: Hard time on hills

I don’t know which model it is But it’s got a m56 engine and encarwi h12 carb.

Re: Hard time on hills

I had the same problem. Took off the exhaust and ran it to see if it was clogged. Nothing. Cleaned the carb. Puch Magnum barely would make it up hills and was slow. Rear tire got wobbly after a long ride and I took it apart. One side was completely missing a bearing on the axle. The axle was grinding through the bearing cup. Now I have to do an upgrade to sealed bearings. Check your front and rear axle bearings.

Re: Hard time on hills

Ok I will

Re: Hard time on hills

How are the reeds?

Re: Hard time on hills

Good question on reeds. I figure this bike will be a fall/winter project. I’ll check our bearings and reeds. I might ask more questions, this is pretty new to me but I’m reading everything on the topic of mopeds. I’m obsessed!

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