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How to tell what motor you really have 49cc-110cc 4 stroke.

154136 Views 65 Replies 33 Participants Last post by  benjnmercy, 
T
On the block you will find a number cast mine is on the left side under the transmission. This is on the block generally you can find a casting on the head as well but sometimes they miss with that before they ship the bikes.......
if the casting says:
1p39fmb = 49cc
1p47fmf = 70cc
1p47fmf = 90cc
1p50fmg = 100cc
1p52fmh = 110cc
hope this helps
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@tjferris
mine is stamped hs152fmh..???
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EPR
If you have a 110cc ( 107cc ) it will show 107CM3 on the bottom of the cylinder on the left or right, can't remember.
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CAM2
EPR said:
If you have a 110cc ( 107cc ) it will show 107CM3 on the bottom of the cylinder on the left or right, can't remember.
Click to expand...

Not all show 107cm3 for the 110cc........One of my engines had a cylinder casted with 108cm3..That was my older 2006 model X15 too.
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EPR
They also had 49CM3 on cyld that were really 70cc on some 4 stroke pocket bikes. 107 or 108 either way there 110cc. My 1100 Honda was 1050cc, my 750 was 736cc, my 850cc chopper was 836cc, everyone rounds off the real size.
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teenabee209
hey pocket bike forum I have a question ..i have a small engine that id like to put on my cag question is I don't the size of it im too stupid to know how to measure the bore but what I can tell you is that it has 2 rows of numbers on the block >A1E34F< underneath it says >*0103004660* (*= a star) can I tell the size of the engine from that set of numbers or no? please any help will make my day,
nubbie
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CAM2
teenabee209 said:
hey pocket bike forum I have a question ..i have a small engine that id like to put on my cag question is I don't the size of it im too stupid to know how to measure the bore but what I can tell you is that it has 2 rows of numbers on the block >A1E34F< underneath it says >*0103004660* (*= a star) can I tell the size of the engine from that set of numbers or no? please any help will make my day,
nubbie
Click to expand...
Those #'s dont compute.......Look exactly where the pic shows....if it says 48cm3;-thats 50cc but chances are its 70cc.....

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G
Holy smoke!

Finally i have found a thread regarding these type of engines.
I have a 1P39FMB and I was wondering if I could buy a cylinder kit for the 1p47fmf because they have the same stroke but im worried that the bolts wont fit...
I'm trying to get a little more juice out of my 49cc engine but i have tried everything like jetting, performance air intake, carburetor tuning, changing front sprocket with 1 tooth and checking for limitations but without luck.
could any of you please help me at least getting on a lead how I can get more power out of my engine? I also tried finding a performance camshaft but i only find GY6 camshafts which obviously are completely different.
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EPR
You probably have a 50cc 4 stroke Honda clone engine. I believe the 50 and 70cc have a different bore and stroke. Online go to www. tboltusa .com, they have all the stuff. For around $400, they have a 88cc hp kit w/ high top piston, it will beat a stock 110cc. Email or call them about a cam, there totally cool people and have good prices. The case & mounting studs are the same on the 50 or 70cc.
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CAM2
EPR said:
You probably have a 50cc 4 stroke Honda clone engine. I believe the 50 and 70cc have a different bore and stroke. Online go to www. tboltusa .com, they have all the stuff. For around $400, they have a 88cc hp kit w/ high top piston, it will beat a stock 110cc. Email or call them about a cam, there totally cool people and have good prices. The case & mounting studs are the same on the 50 or 70cc.
Click to expand...

50 and 70cc engines have the same stroke......90cc and 110cc engines have the same stroke but different from a 50/70cc....They all use the small valve E22 head

Alot of 70cc engines were labeled 48cm3 was a dishonest practice done by the chinese to get through customs faster and without scrutiny

For $225.00 free shipping you can get a 125cc kickstart only engine complete ready to bolt-in and go practically to slap right into the frame.....some modding will be required..........
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Dans
Hi everyone I’ve Got a zq147fmf 90cc engine could anyone tell me about piston an Cylinder size please, know it’s a old post but going out my mind trya find parts
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MrKitty
The only way to truly know what is inside of those Chinese engines is to open them up and mic the piston
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Pitbikemike
tjferris said:
On the block you will find a number cast mine is on the left side under the transmission. This is on the block generally you can find a casting on the head as well but sometimes they miss with that before they ship the bikes.......
if the casting says:
1p39fmb = 49cc
1p47fmf = 70cc
1p47fmf = 90cc
1p50fmg = 100cc
1p52fmh = 110cc
hope this helps
Click to expand...
How bout a 125cc
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Dan481
[QUOTE = "TTMAN, message: 116349, membre: 11318"]
bartw, wat est votre observation en ce qui concerne le numéro de série quand vous avez découvert que c'est un 72cc ??? avait-il le numéro de série d'un 49cc (1P39FMB)?
[/CITATION]
Le mien oui ! 1p39fmb mais c’est un 72cc
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boondocks831
2
EPR said:
They also had 49CM3 on cyld that were really 70cc on some 4 stroke pocket bikes. 107 or 108 either way there 110cc. My 1100 Honda was 1050cc, my 750 was 736cc, my 850cc chopper was 836cc, everyone rounds off the real size.
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So I've read and keep hearing all types of different things this is on the bike I just got
160368
160369
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boondocks831
boondocks831 said:
So I've read and keep hearing all types of different things this is on the bike I just got
View attachment 160368 View attachment 160369
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Four stroke 4-speed semi-auto
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MrKitty
It's just a Honda Z50 50cc 4 stroke clone but any pit bike engine will fit they all use the same bolt pattern
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boondocks831
MrKitty said:
It's just a Honda Z50 50cc 4 stroke clone but any pit bike engine will fit they all use the same bolt pattern
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Okay and then I keep hearing PZ19. I just hate not having all the information even if it really doesn't mean anything it just kills me sometimes LOL thank you
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MrKitty
The PZ19 covers from 50cc upto a 160cc piranha so you can't go wrong there
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GypsyWolf
5
PocketPsycho said:
To my knowledge there is more to finding out the cc of an engine then just measuring the bore. IE measureing the stroke also.

I highly doubt they would stamp a 70cc motor with 48cc.
Click to expand...
That's funny you say you would highly doubt the very markings I am actually looking at on the very motor I'm working on. I just got this basket case pit/ pocket bike in and literally the case is stamped 1P39FMB but the cylinder is stamped with 72CM³. Since it seems you have a hard time believing what your told here's a few pics just to prove what's being said.. now I'm trying to find out what I have so I was searching Google for information when I came across this thread. . This motor has no left side cover. Only 3 wire from the stator.a shifter lever but I don't see a clutch arm on the motor so I'm assuming it's an 70 cc Kickstart with automatic transmission. It appears to to be a 4 speed with neutral being all the way up and all the gears are shifting down, but I could be being mislead since it feels like 2 of the gears are slipping and sometimes grab but other times as I shift it slips. So if anyone has more information about what I have and am working with I'd greatly appreciate your knowledge
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Hood Auto part Motor vehicle Automotive exterior Gas
Tire Automotive tire Automotive lighting Motor vehicle Tread
Automotive tire Motor vehicle Automotive exterior Font Bumper
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MrKitty
GypsyWolf said:
That's funny you say you would highly doubt the very markings I am actually looking at on the very motor I'm working on. I just got this basket case pit/ pocket bike in and literally the case is stamped 1P39FMB but the cylinder is stamped with 72CM³. Since it seems you have a hard time believing what your told here's a few pics just to prove what's being said.. now I'm trying to find out what I have so I was searching Google for information when I came across this thread. . This motor has no left side cover. Only 3 wire from the stator.a shifter lever but I don't see a clutch arm on the motor so I'm assuming it's an 70 cc Kickstart with automatic transmission. It appears to to be a 4 speed with neutral being all the way up and all the gears are shifting down, but I could be being mislead since it feels like 2 of the gears are slipping and sometimes grab but other times as I shift it slips. So if anyone has more information about what I have and am working with I'd greatly appreciate your knowledge View attachment 161052 View attachment 161053 View attachment 161050 View attachment 161051 View attachment 161053 View attachment 161054
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This is what happens when the engines were made in China and assembled in Malaysia and they run out of some parts so they just slap some other parts on there lol
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