Doc's Anything Goes
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Post by dmartin95 on Jan 17, 2015 22:07:29 GMT -6
f they are 3" then the stock 157 sizes apply, if it is 3.25, then that is a different cylinder and harder to find parts for it. Ok scooter-god, did you miss the big glaring post with his engine stamp?  Engine: 1 61QMK-A But Alley is right about the -A ... You may very well have a b-case. |
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Post by Alleyoop on Jan 17, 2015 22:31:23 GMT -6
Did not miss his engine stamp but I had not seen his Cam which is not your run of the mill that is when I started to ask the additional questions. I don't believe that motor is made from a 157a case. You have to be VIGILANT and notice and hear things, that is why they call me the SCOOTER-GOD, you can bow and kiss my hand.  |
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Post by dmartin95 on Jan 17, 2015 23:05:59 GMT -6
Did not miss his engine stamp but I had not seen his Cam which is not your run of the mill that is when I started to ask the additional questions. I don't believe that motor is made from a 157a case. I don't know if that motor is an A or a B case... There's nothing in any of these post to suggest one way or another... What I do know is that because his scooter has a 61mm piston it's not a typical motor... When you upgrade the piston, it allows you to do more upgrades.... The K in his motor stamp means it's in the 175 class cc. Unless you're a beautiful female, this thread just got weird......  |
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Post by Bashan on Jan 18, 2015 0:34:51 GMT -6
I would like to clear this whole "B-case" thing up... It should even be pinned somewhere...A "b-case" comes in short/long case as well. Jerry's case is what's called an extra-long case. It has a taller head (73mm), longer chain, different lobe cam and the case itself is longer (to accommodate 16" wheel) ... Most standard 157QMJ parts are not interchangeable. But, what defines a "b" case motor boils down to one thing. Are the studs spaced at 57 or 54mm apart. BOTTOM LINE right there... If it's an "a-case" studs are 54mm apart If it's an "b-case" studs are 57mm apart When I first started learning about these motors, I was inquiring for info on these boards....I have a ZNEN built motor (BN157QMJ) and was told I had a b-case motor based upon my engine stamp... Well, I'm glad I looked into it further because It's not a B-case. It's a standard 157QMJ built by ZNEN, hence the BN. |
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Doc's Anything Goes
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Post by tvnacman on Jan 18, 2015 6:49:07 GMT -6
I would like to see a pic of the valve cover, the dipstick area showing the cooling fan and rear wheel showing the space between the rear wheel and the engine case . I would like to also see the height of the manifold .
John
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Post by dmartin95 on Jan 18, 2015 8:03:18 GMT -6
I would like to clear this whole "B-case" thing up... It should even be pinned somewhere...A "b-case" comes in short/long case as well. Jerry's case is what's called an extra-long case. It has a taller head (73mm), longer chain, different lobe cam and the case itself is longer (to accommodate 16" wheel) ... Most standard 157QMJ parts are not interchangeable. But, what defines a "b" case motor boils down to one thing. Are the studs spaced at 57 or 54mm apart. BOTTOM LINE right there... If it's an "a-case" studs are 54mm apart If it's an "b-case" studs are 57mm apart When I first started learning about these motors, I was inquiring for info on these boards....I have a ZNEN built motor (BN157QMJ) and was told I had a b-case motor based upon my engine stamp... Well, I'm glad I looked into it further because It's not a B-case. It's a standard 157QMJ built by ZNEN, hence the BN. Why did you quote that? None of that information is relevant. Jerry has a BN157QMJ-3 which is a motor i'm somewhat familiar with. t84a's motor is a 161QMK-A.... The only thing I can tell about t84a's engine is what I can read in his engine stamp.  Sourced from scrappydogs website. |
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Post by tvnacman on Jan 18, 2015 8:19:50 GMT -6
Why did you quote that? None of that information is relevant. Jerry has a BN157QMJ-3 which is a motor i'm somewhat familiar with. t84a's motor is a 161QMK-A.... The only thing I can tell about t84a's engine is what I can read in his engine stamp. Sourced from scrappydogs website. detective dmartin95 can you solve for my engine LB1P57QMJ ? I would like to see what information you can come up with ? John |
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Post by dmartin95 on Jan 18, 2015 8:44:28 GMT -6
detective dmartin95 can you solve for my engine LB1P57QMJ ? I would like to see what information you can come up with ? John Sure, I'll dig up some info on that motor... |
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Post by dmartin95 on Jan 18, 2015 9:00:42 GMT -6
LB - Wenzhou Runtong Motor Vehicle (I'm not 100% sure on accuracy of manufacturer)
1 - = 1 cylinder
P - Horizontal engine
57 - 57.8mm Bore
Q - Forced Air cooled
M - Motorcycle
J - 150cc class engine
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Now, that's all I can tell from your engine stamp but when I went looking trying to find who your manufacturer is, I came across old thread on scootdawg and your engine may be an oddball. You may have the taller 73mm head... I would really have to put the detective cap on and search google.... But I have been cataloging info on these engines as I find them...
Here's an example:
Model:1P52QMI
Displacement:124.65ml
Compression ratio: 9.2:1
Primary reduction: 2.65—0.8 Bore*Stroke:52.4mm*57.8mm
Max.Net Power & Rotating Speed: 5.2kw/7000r/min
Rated Power & Rotating Speed: 5.0kw/7000r/min
Max.Torque & Rotating Speed: 7.5N.m/6000r/min
Min.Fuel Consumption: =403g/kw.h
Idling Speed:1600r/min
Ignition:CDI
Starter:Electric starter/Kick starter
Lubrication: Pressure/splash
Transmission: automatic drive speed
Model:1P57QMJ
Displacement:149.6ml
Compression ratio: 8.8:1
Primary reduction: 1.6—0.86
Bore*Stroke:57.4mm*57.8mm
Max.Net Power & Rotating Speed: 6.4kw/7000r/min
Rated Power & Rotating Speed: 6.0kw/7000r/min
Max.Torque & Rotating Speed: 9.6N.m/5500r/min
Min.Fuel Consumption: =389g/kw.h
Idling Speed:1600r/min
Ignition:CDI
Starter:Electric starter/Kick starter
Lubrication: Pressure/splash
Transmission: automatic drive speed
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I found that info on a website selling cams..... I would like to add the info from your engine and t84a's to it.... You have any info you can share about your engine?
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Post by t84a on Jan 18, 2015 9:08:32 GMT -6
Sometimes the "P" after the "1" means you have a different head.
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Post by Bashan on Jan 18, 2015 9:19:49 GMT -6
Wow, sorry Dmartin, it was late and I was sleepy. It's called a mistake and I'm glad you don't make them. You should cut back on the caffeine. 
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Post by dmartin95 on Jan 18, 2015 9:37:04 GMT -6
I would like to see what information you can come up with ? John Hey John, I've just about completed the short form spec sheet for your engine... Perhaps you can see if any of the missing fields can be found in either your manual or on the scooter stamp plate (the one by your knee area) Model:LB1P57QMJ Displacement:149.5ml Compression ratio: 9.2:1 13 Primary reduction: _____________ Bore*Stroke:57.4mm*57.8mm Max.Net Power & Rotating Speed: ___________________ Rated Power & Rotating Speed: 6.8kW/7,000rpm Max.Torque & Rotating Speed: _________________ Min.Fuel Consumption: =389g/kw.h Idling Speed:1600r/min Ignition:CDI Starter:Electric starter/Kick starter Lubrication: Pressure/splash Transmission: automatic drive speed |
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Post by tvnacman on Jan 18, 2015 9:54:18 GMT -6
Sometimes the "P" after the "1" means you have a different head. Yes I have a different head on my engine , my valve cover is bolted with 2 bolts . My variator is 123mm my crank and cam are different too .My intake manifold is the taller one too . I have not measured my bolt hole spacing . So is my engine a "p" 'B'  ?? Could it just be the chinese just don't have a standard to go by ? John |
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Post by dmartin95 on Jan 18, 2015 10:22:58 GMT -6
Sometimes the "P" after the "1" means you have a different head. Could it just be the chinese just don't have a standard to go by ? John No, that is not the case. I come from the IT field where part numbers are everything.... So, applying that to chinese part numbers is no different... The GY6 "150" can come in many flavors, but knowing how to read the part numbers allows you to know certain things about the engine without having to take it apart... Things such as cylinder size.... One of things it does not tell you though is if it's a "b" case... The only engine I know of that is a b-case by the part number is Jerry's... It's a ZNEN specific number... In all honesty, your post is rather surprising considering you sell scooter parts... If you know the base part number, you can then find out what after market parts go to what... The chart provided by scrappydogs is a "chinese standard"..... Well, I'm not sure if it's Chinese specific, but I do l know the stamp isn't meaningless and knowing how to read part numbers can tell ya a lot. As to if you specifically have a B case, I have no clue... Only way I know for 100% sure is to measure the stud spacing. |
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Post by dmartin95 on Jan 18, 2015 10:35:08 GMT -6
Wow, sorry Dmartin, it was late and I was sleepy. It's called a mistake and I'm glad you don't make them. You should cut back on the caffeine. LOL.... and kill my Mt. Dew I.V. No way..!!!!  Me an alley were tossing around the idea t84a's engine could be a b-case, but yet dmartin95 says in a different thread let's put the b-case issue to rest..... I can understand the confusion.... But just to clear up any confusion for anyone else that reads this.... You can not in most cases tell if you have a b-case motor by the engine stamp (Jerry's being the one exception I know of)... You determine if you have a b-case by measuring the studs... That's what I meant by putting the issue to rest.... If someone wants to know if they have a b-case, tell 'em to measure the studs. |
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..BAD TO THE BONE..
?? Could it just be the chinese just don't have a standard to go by ?