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Forum: Street

05-17-2024, 09:32 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

I am surprised as a honda 50CC engine is stated...

I am surprised as a honda 50CC engine is stated for approx 5HP.

There is no technical limit imposed on the power over here, only on the max speed of the moped.

The engine is fuel-injected (no...

Forum: Street

05-17-2024, 09:27 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

It looks as though various regions have differing...

It looks as though various regions have differing definitions of "Moped". In my neck o' the woods (Belgium) scooters can be moped's or motorcycles. Depends on the displacement. Anything below 50CC is...

Forum: Street

05-14-2024, 03:09 PM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

Yep, EFI with ECU. That didn't do much for the...

Yep, EFI with ECU. That didn't do much for the power though, and still a low compression of 86 PSI.

I agree a carb & CDI would be easier to tweak. (up to MY 2019 or 2020 it was a CDI that was...

Forum: Street

05-13-2024, 11:58 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

It is an option. But the ECU will need to be...

It is an option. But the ECU will need to be reprogrammed.

There are also 70 and 85cc kits available. But these also need reprogramming of ECU.

Forum: New Member Introductions

05-13-2024, 12:59 AM

Replies: 5

another old "geezeer" with a chinese bike

Views: 261

Posted By pdegroote

the Mash 50 is a 50cc. It is the latest...

the Mash 50 is a 50cc. It is the latest acquisition and is parked next to a Honda CB Two-fifty, a Suzuki '96 DR650, a Suzuki '95 DR350 and an '05 BMW R1200 GS.
The '96 Landrover defender 300 Tdi...

Forum: Street

05-13-2024, 12:41 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

That is possible. It could also be based upon the...

That is possible. It could also be based upon the Honda 50cc four-stroke.

regards

Forum: Street

05-13-2024, 12:39 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

Sorry, it looks like the manual is wrong. The...

Sorry, it looks like the manual is wrong. The engine states: 139FMB. (the engine you showed is a 125cc, my engine is a 50cc)

Forum: Street

05-13-2024, 12:37 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

Yes. That's the one

Yes. That's the one

Forum: Street

05-13-2024, 12:29 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

The manual states: K157FMI, but I checked the...

The manual states: K157FMI, but I checked the engine and it is marked as 139FMB (the vetical type, as that type has a vertical and horizontalversion).

I also checked the compression and it...

Forum: Street

05-13-2024, 12:24 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

This motorbike is a 49,5 CC motorbike, in Belgium...

This motorbike is a 49,5 CC motorbike, in Belgium (pedals or not) this is a moped. It is restricted to 45KM/h. If unrestricted it becomes a motorbike (legally speaking). It is definitely NOT a...

Forum: Street

05-13-2024, 12:20 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

Yes that's the one. About the engine...

Yes that's the one. About the engine type,although the manual lists it as a K157FMI the designation on the engine says: 139FMB.

Forum: Street

05-12-2024, 10:32 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

Not really the answer I was looking for :hmm:....

Not really the answer I was looking for :hmm:. But you're answer is appreciated anyway.:thanks:

This being said I just quickly measured teh compression and it it seems way to low..
It reads...

Forum: New Member Introductions

05-12-2024, 10:27 AM

Replies: 5

another old "geezeer" with a chinese bike

Views: 261

Posted By pdegroote

another old "geezeer" with a chinese bike

hi there,

patrick is the name and mash 50 is the bike (moped).
Hope to find some advice here on improving the bike.

Forum: Street

05-12-2024, 08:41 AM

Replies: 27

50 CC chinese engine tuning

Views: 669

Posted By pdegroote

50 CC chinese engine tuning

Hi,

I am the owner of a MASH fifty moped. It is a fun bike, very nimble, but alas underpowered. As I have the license to ride all motorbikes (permit A in Belgium) I would like to figure out if...

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