BuggyDepot.com Tech Center 2.0   Categories: All Articles [36] Maintenance & Troubleshooting [3] BDX Install Guides [11] GY6 Performance Advice [3] Service Manuals [1] How It Works! Writeups [5] General GY6 Information [5] Weaknesses & Fixes [1] Modification Ideas [0] BuggyDepot News   Current Status Of Ruckus Swap Kits [Update 8-16-11] Tuesday, August 16, 2011 Front Brake Kits For Yerf Dog GX150 Now Available! Sunday, March 6, 2011 New GY6 Race-built Engine Machining & Building Services! Saturday, January 22, 2011 Overhauled BD Technical Center Released! V2.0 Monday, February 22, 2010 BuggyDepot.com December 2009 Newsletter Wednesday, December 9, 2009 Please note...   Content is copyright © 2005 - 2012 Buggydepot.com HOW IT WORKS! DECYPHERING GY6 ENGINE CODES [13,986 views]   This simple explanation reveals how to crack the code and tell what engine you have. How It Works! Decyphering GY6 Engine Codes [13,986 views - 41 comments - Rating 4/5 ] So you found a code on your buggy or scooter and you're wondering what it means. The code can actually tell you a lot about a specific engine. You can find your engine code below the CVT cover, beside the oil drain plug. We'll take a look at the most common engine code: 157QMJ. The first thing to note is that the actual code always starts with the first number, and continues for a total of 6 digits. Anything extra is a manufacturer-specific information that won't be covered here at this time. Lets disect the code starting with the first digit: (Digit #1) Corrasponds to the number of cylinders. All GY6 engines are single cylinder, so this number will always be 1. (Digit #2 and #3) This is the bore size in metric millimeters, in the case of the 157QMJ, our bore is 57mm. Note that 57.4mm bore engines fall under the "57" designation. (Digit #4) relates to the style of engine. All GY6 engines are designated "Q". (Digit #5 and #6) The actual size of the engine. The second letter ascends consecutively for each 10cc. MB = 50cc, MC = 60cc, MD for a 70, MH = 110cc, MI = 125cc, MJ = 150cc That is pretty much it for the standard codes stamped on most GY6 and other Chinese engines. We will add more information about manufacturer-specific codes as we find it out. Feel free to post your engine code or any additional information below in our comments box, we'll add any new information here! This article has been downloaded 13,986 times 41 comments about this article: Poster #1 [03/01/10] hell yes. Poster #2 [03/11/10] Hi, My code is 157FM. Digit #4 is an "M". What type of engine do I have? Thx Poster #3 [03/15/10] Hello my eng code is 150GA1 what type eng.is this Poster #4 [Travis @ BD-ORB] [03/29/10] Poster 2&3: I did some research to see what I could find on your specific engine codes and couldn't find anything to help any further, sorry. To Poster 1: Yes indeed! Poster #5 [04/08/10] Hi, My engine code is 157QMG. What type of engine do I have? Thank you for your help. Poster #6 [04/08/10] Sorry, I mis-typed my code.......it's 157QMJ. What type of engine is this? Thank you for your help. Poster #7 [04/14/10] well i have one for you code 157FM what is that Poster #8 [Travis @ BD-ORB] [04/14/10] @ Poster #6: "157QMJ" is the 150cc GY6. All of the engine/performance parts we carry should be compatible. Give us a call if you have any questions about compatibility of parts with your engine. @ Poster #7: I can't find any information on the "FM" part of your code. Can you provide any more information about your vehicle type/make/model? I might be able to help with more information. Poster #9 [04/15/10] i have a 2004 kasea 150cc quad and it has the 157FM on it as well, type of engine is it?! driving me nuts looking... Poster #10 [05/20/10] Rating 3/5 I got a buggy with no name or marking but the NO# on the case are JL1P57QMJ can anyone tell me about it Poster #11 [06/23/10] will these numbers tell us if its a short case or long case because thats really what you need to know to get a replacement engine. i have a QMJ157 0605120863 Poster #12 [07/09/10] The 157FM engine is made by Linhai and was used in KPX, Hammerhead Twister and Carter Talon buggies. Poster #13 [08/11/10] i have a 157fm will parts for a 157QMJ work on it Poster #14 [08/11/10] thanks Poster #15 [08/11/10] Rating 5/5 thanks again Poster #16 [08/31/10] Digit 4 indicates forced air cooling if it is a q Digit 5 is either m = motorcycle or a = automotive [img]http://www.scrappydogscooters.com/images/engine-code-chart.jpg[/img] Poster #17 [09/07/10] yes Poster #18 [09/08/10] i have a kasea 125cc adventure buggy at least thats what the frame says and the code says ct125 on it what does this mean Poster #19 [09/23/10] can any one tell me about LH15QMJ 4H4779 Poster #20 [10/07/10] my code is 1P57QMJ,is ther any differnt from 157QMJ??? Poster #21 [10/24/10] Rating 1/5 my gy6 says k01494. it says on the head ky10 gy6. the side cover says smc. what the heck is it and what parts do i use. it is on a carter xtv 2150. this is the problem since carters facility burnt down in july i believe. Poster #22 [11/03/10] Rating 3/5 what is the compression in psi's of my gye howit 150cc engin Poster #23 [11/09/10] LH157QML what is it Poster #24 [02/13/11] 157 fm *02110680 twister kart Poster #25 [02/23/11] I have a 150GCA looking for my for parts for my transmission a 4'shaft that has 2 gears on it guessing forward and reverse as well i need the final gear kinda missing a few teeth can you help ? Poster #26 [05/04/11] i hav a medium size quad cant figure out what the heck it is found engine code its xf-147qmf 03041123 help Poster #27 [05/18/11] I have 2003 Yerf-Dog Scout and the engine # by oil drain are AT36007609. Need some help diagnosing 1 spark when you crankit over. help Poster #28 [05/22/11] A136 Poster #29 [05/22/11] What size is my motor. A136 Poster #30 [06/25/11] What do the numbers tell me about my bugie that are under the numbers 157 qmj they are *041102546* Poster #31 [07/04/11] i have a crossfire 150 and the only number i found was 150SB1 OR 150SBJ can you tell me what i need to look for to rebuild my engine Poster #32 [08/23/11] I have an unknown manufacturer for my 2 seater buggy. But it does have a GY6 motor on it. My case numbers are: XF-157QMJ *04053343* any ideas? Poster #33 [08/29/11] the engine in my Talon is a 157FM, 04058860, is it still a gy6 and is it a 150? i have read other posts that say this engine is a 125cc Poster #34 [10/26/11] Please decode the engine in my American Sportworks Series 200: JL1105 14G Poster #35 [10/26/11] I also have engine with Code 157FM. Hammerhead Twister supposed to be 150. What info can you give me on this? Poster #36 [11/16/11] Rating 5/5 Need to get a cert of origin or MSO for my 2003 yerf dog rover. Anyone have any ideas how to get this? Need to get a title for offroad tag. Thanks Poster #37 [11/22/11] i have a talon was tyold it was 150cc? 157fm engine also im looking to put a big bore kit on it for 150cc. will the gys kit work/ Poster #38 [11/22/11] Rating 5/5 will gy6 bore kits work on 157fm talon karts/ Poster #39 [12/29/11] IP57QMJ 050804041 These are the codes for my single seater Buggy. i NEED A NEW CARBURETOR CAN YOU ADVISE ON TYPE MODEL I NEED. Also I bought this second hand can you advise of any other information you might have please. I presume it is a 4 stroke engine 150cc, any idea of year of manufacture ect Poster #40 [01/10/12] The Carter Talon 157fm gy6 engine is a 57mm bore cylinder. The 157FM appears to be a based on the 125cc cases with the cylinder bored to 57mm. I have tryed installing a 57mm cylinder from a 157qmj and the cases are to small to accept the cylinder sleeve. I have to disagree with post #38 the qmj cylinder will not fit the fm cases.. Poster #41 [01/17/12] i have one with # LH157DMI 4A358 HELP WITH ID.. Write a comment: Rate this article (no comment needed) 5/5 - Extremely Helpful... 4/5 - Helped me, but not entirely clear... 3/5 - Needs more detail... 2/5 - Should be revised... 1/5 - Re-do this one... Are you a human? Type "yes": You can rate this article without commenting... Just select your rating and leave the comments form blank!