Planet Minis

Pat Farsole · 01-12-2007, 08:23 AM

Quote:

Originally Posted by Kurlon

Winston, have you actually measured the bore and stroke on that motor?

(And for reference, the Lifan 'Monster' tag refers to a specific Lifan 120 motor, all others are not monsters despite similar specs or bottom ends.)

Kurlon is dead right . The actual 120 monster Lifan has ports that are larger (wider) , smoother and cleaner finished inside and the casting around the guide is larger diameter than the later "R" type big valve heads .

Pat Farsole · 01-12-2007, 08:53 AM

Quote:

Originally Posted by jkline805

hey i have the same Lifan big valve with the 124cm3 on the cylinder that turned out to be a 52.4x55mm, but the funny thing is, my engine # is 156FMI. I dont think that you can trust any of the markings on the cylinder and apparently not the model # either. oh well.

Take a look inside your inlet port and IF the casting boss around the guide is a large diameter and the port is a smooth , clean finish , you have a genuine 120 "monster" motor . We have one of them and it is a 156FMI . I pulled the head off it new to check the bore to see if it was 56 mm but it was only 52.4 . The 124 big valve 1P52FMI motor turned out to be a 120 with ports that aren't as good as the genuine monster 120 !

little_twin · 02-01-2007, 09:12 AM

Just a little info I gathered while putting my 54x54 back together.
Cam=short 68mm
the wide spaced valve springs from DrAtv were too short, and "softer" than the stock valve springs.
The 56mm copper head gasket worked well, but required a small amount of modification.
I dont think the valves on mine are 27, 23 but I didn't measure them.

~E · 02-01-2007, 09:54 AM

Quote:

Originally Posted by Z50King

the last three numbers on the top row,

FAH or FMH

A = automatic clutch
M = manual clutch

i dont think anyone knows what F or H mean

"For Auto Hammering"
"For Manual Hammering"

lol. Great thread Kurlon. Need more like this.

firepower354 · 03-27-2007, 10:15 AM

Has anyone compiled a list of the con rod and crank pin specs on the Chinese motors? I'm looking to do some parts swapping.....

Kurlon · 03-27-2007, 11:59 AM

I've not seen that info posted anywhere yet.

firepower354 · 04-01-2007, 05:04 PM

Anyone got ANY specs? We gotta start somewhere.
The 50 I just tore down has a 23x39 pin. Rod has 28x14 BE. 94mm long.

dragndave · 04-01-2007, 05:09 PM

the gpx,sdg 107, lifan 120, and every 90-110cc china motor has a 25x39 pin and the rcm 120 has a 26x39 pin.the honda 50-70 is smalled diameter but same length

brettt · 06-02-2007, 10:53 PM

got a loncin 125
says 123 on cylnder
bore 52.5 stroke 67.5
pin hole 14 to piston top (flat piston)
14 pin
cyl height 69
intake 23
exhaust 19
is this a 120?monster?
bought a 138 kit from china the bottom of cylnder doesnt fit in the case hole
and the studs are spaced different
can i mod the cyland cace to fit or is it wrong
china guy told me its for ducar 125
also got inner rotor cdi light oil slinger works sweet rev-o-matic

melloyello · 06-03-2007, 07:06 AM

Quote:

Originally Posted by brettt

got a loncin 125
says 123 on cylnder
bore 52.5 stroke 67.5
pin hole 14 to piston top (flat piston)
14 pin
cyl height 69
intake 23
exhaust 19
is this a 120?monster?
bought a 138 kit from china the bottom of cylnder doesnt fit in the case hole
and the studs are spaced different
can i mod the cyland cace to fit or is it wrong
china guy told me its for ducar 125
also got inner rotor cdi light oil slinger works sweet rev-o-matic

Maybe you measured the stroke wrong or typed it in wrong. That would give you a 146cc engine. If it was 57.5 then you would have 124cc.

brettt · 06-03-2007, 08:39 AM

sorry the stroke is 55 mabey 55.5
con rod is 88 from crank round to top of con rod
con rod says xie ma 110-2
im assuming you measure cylnder for bore not piston?

TheCRKid · 06-03-2007, 06:45 PM

Quote:

Originally Posted by brettt

got a loncin 125
says 123 on cylnder
bore 52.5 stroke 67.5
pin hole 14 to piston top (flat piston)
14 pin
cyl height 69
intake 23
exhaust 19
is this a 120?monster?
bought a 138 kit from china the bottom of cylnder doesnt fit in the case hole
and the studs are spaced different
can i mod the cyland cace to fit or is it wrong
china guy told me its for ducar 125
also got inner rotor cdi light oil slinger works sweet rev-o-matic

the one thing that is questionable is 69mm tall cly ,,,,the monster /gpx is 78mm

we just had a customer with a loncin that the tb146cc would not fit due to small case hole

RcWannabe · 06-03-2007, 07:30 PM

Quote:

Originally Posted by jkline805

hey i have the same Lifan big valve with the 124cm3 on the cylinder that turned out to be a 52.4x55mm, but the funny thing is, my engine # is 156FMI. I dont think that you can trust any of the markings on the cylinder and apparently not the model # either. oh well.

Mine is the same way, the later 2006 Rcm bikes Lifan motors have the 1*56*FMI marking with 124cc on the cylinder but they are in fact a regular old monster lifan 120 with 52.4x55.5.

brettt · 06-03-2007, 08:55 PM

got a title with the bike says 9.8hp?
could this be correct
do you measure cyl from gasket to gasket or include the tongue into case
mine was based on gasket to gasket

GeoB · 06-06-2007, 12:52 PM

Quote:

Originally Posted by Z50King

the last three numbers on the top row,
FAH or FMH
A = automatic clutch
M = manual clutch
i dont think anyone knows what F or H mean

I was just given a mystery engine with the eng# HS1P47FMD
*350J1662*

It is definitely an auto clutch.

GeoB

firepower354 · 09-22-2007, 07:41 PM

Quote:

Originally Posted by firepower354

Has anyone compiled a list of the con rod and crank pin specs on the Chinese motors? I'm looking to do some parts swapping.....

Anything yet?

Kurlon · 09-22-2007, 07:47 PM

I don't recall the thread, but the Jialing 125 and Lifan 120 pin sizes got posted, other than that I've not seen anything.

boonacka · 11-19-2007, 09:47 AM

I bought a motor from Fatcaat last year and he told me it was a Jialing 120. I put in a 131 bbk a while ago with the help of Vince from Tbolt. I remember it starting out at 52.5 x 55.5 with a 27/23 head with long anti-kickback cam, 13mm wristpin, and Honda stud spacing. Dont know how much info you have on this motor

fatcaaat · 11-19-2007, 10:00 AM

Quote:

Originally Posted by boonacka

I bought a motor from Fatcaat last year and he told me it was a Jialing 120. I put in a 131 bbk a while ago with the help of Vince from Tbolt. I remember it starting out at 52.5 x 55.5 with a 27/23 head with long anti-kickback cam, 13mm wristpin, and Honda stud spacing. Dont know how much info you have on this motor

This may actually be an early model of the "Xtreme" motors or a Jialing. Either way, this motor is the one to build up once you fix the tranny issues...which, of course I did before I sold it.

I don't believe it had 27/23 valves...I think it had 25/22 valves in it, which are big for that style and stud spacing.

And, like I always say about this motor...keep me in mind when it is worn out and you need a new one!

boonacka · 11-19-2007, 11:57 AM

Your right it was 25/22. Well with the 131, VM26, G2 cam and mild porting, this motor feels like a beast. I swapped out the shiftstar with the "fixed" shiftstar from SDG and now no more mis shifts.

I'll sell you this motor back if you have a lifan 120 monster i can buy from you.

04-01-2007, 05:04 PM	#27 (permalink)
firepower354 3rd Gear Member Join Date: Oct 2006 Location: Flint MI Posts: 5,186	Anyone got ANY specs? We gotta start somewhere. The 50 I just tore down has a 23x39 pin. Rod has 28x14 BE. 94mm long. Last edited by firepower354; 04-01-2007 at 05:19 PM.

04-01-2007, 05:09 PM	#28 (permalink)
dragndave 3rd Gear Member Join Date: Aug 2006 Location: south florida Posts: 685	the gpx,sdg 107, lifan 120, and every 90-110cc china motor has a 25x39 pin and the rcm 120 has a 26x39 pin.the honda 50-70 is smalled diameter but same length __________________ bud light is for girls, and fags, and girl fags like you Last edited by dragndave; 04-01-2007 at 07:50 PM.

06-02-2007, 10:53 PM	#29 (permalink)
brettt PM Newbie Join Date: Jun 2007 Posts: 4	Re: Import Motor FAQ - Long Stroke Mills got a loncin 125 says 123 on cylnder bore 52.5 stroke 67.5 pin hole 14 to piston top (flat piston) 14 pin cyl height 69 intake 23 exhaust 19 is this a 120?monster? bought a 138 kit from china the bottom of cylnder doesnt fit in the case hole and the studs are spaced different can i mod the cyland cace to fit or is it wrong china guy told me its for ducar 125 also got inner rotor cdi light oil slinger works sweet rev-o-matic

06-03-2007, 08:39 AM	#31 (permalink)
brettt PM Newbie Join Date: Jun 2007 Posts: 4	Re: Import Motor FAQ - Long Stroke Mills sorry the stroke is 55 mabey 55.5 con rod is 88 from crank round to top of con rod con rod says xie ma 110-2 im assuming you measure cylnder for bore not piston? Last edited by brettt; 06-03-2007 at 08:50 AM.

06-03-2007, 08:55 PM	#34 (permalink)
brettt PM Newbie Join Date: Jun 2007 Posts: 4	Re: Import Motor FAQ - Long Stroke Mills got a title with the bike says 9.8hp? could this be correct do you measure cyl from gasket to gasket or include the tongue into case mine was based on gasket to gasket

02-01-2007, 09:12 AM	#23 (permalink)
little_twin 2nd Gear Member Join Date: Jan 2007 Location: Novato, Ca Posts: 493	Just a little info I gathered while putting my 54x54 back together. Cam=short 68mm the wide spaced valve springs from DrAtv were too short, and "softer" than the stock valve springs. The 56mm copper head gasket worked well, but required a small amount of modification. I dont think the valves on mine are 27, 23 but I didn't measure them.

03-27-2007, 10:15 AM	#25 (permalink)
firepower354 3rd Gear Member Join Date: Oct 2006 Location: Flint MI Posts: 5,186	Has anyone compiled a list of the con rod and crank pin specs on the Chinese motors? I'm looking to do some parts swapping.....

03-27-2007, 11:59 AM	#26 (permalink)
Kurlon Super Moderator Join Date: Feb 2005 Location: Windham, ME Posts: 7,561	I've not seen that info posted anywhere yet.

09-22-2007, 07:47 PM	#37 (permalink)
Kurlon Super Moderator Join Date: Feb 2005 Location: Windham, ME Posts: 7,561	Re: Import Motor FAQ - Long Stroke Mills I don't recall the thread, but the Jialing 125 and Lifan 120 pin sizes got posted, other than that I've not seen anything. __________________ http://www.x386.net/TTR 2004 ST3 - 'Duckie'?!?! 2005 CRF70RR - MiniGP Weapon 2005 CRF70 - Dirt Donk 2008 Pitster Pro X4 Motard 1991 GS500E - LRRS/CCS #771

11-19-2007, 09:47 AM	#38 (permalink)
boonacka 2nd Gear Member Join Date: Mar 2006 Location: DC MD VA motard Posts: 475	Re: Import Motor FAQ - Long Stroke Mills I bought a motor from Fatcaat last year and he told me it was a Jialing 120. I put in a 131 bbk a while ago with the help of Vince from Tbolt. I remember it starting out at 52.5 x 55.5 with a 27/23 head with long anti-kickback cam, 13mm wristpin, and Honda stud spacing. Dont know how much info you have on this motor

11-19-2007, 11:57 AM	#40 (permalink)
boonacka 2nd Gear Member Join Date: Mar 2006 Location: DC MD VA motard Posts: 475	Re: Import Motor FAQ - Long Stroke Mills Your right it was 25/22. Well with the 131, VM26, G2 cam and mild porting, this motor feels like a beast. I swapped out the shiftstar with the "fixed" shiftstar from SDG and now no more mis shifts. I'll sell you this motor back if you have a lifan 120 monster i can buy from you.

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