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post #1 of 26 (permalink) Old 11-06-2017, 02:16 AM Thread Starter
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250 or 300

Okay so I bought a Honda FourTrax says on the front of the frame is a trx300 when I went to replace the top in I bought a used motor which I was told was in 300 when I tried to connect the piston to the connecting rod on my original motor the wrist pin was too big now I'm kind of lost not sure if the motor on this FourTrax is a 300 or 250 or vice versa
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post #2 of 26 (permalink) Old 11-06-2017, 03:01 AM
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look on the side of the jug there are cc marks, 246 is a 250, 281 is a 300, the jugs are interchangeable, the heads are also the same on the 250 and 300 except, the 250 doesn't have a decompression lever
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post #3 of 26 (permalink) Old 11-06-2017, 06:34 AM Thread Starter
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My bike Reeves is a 300 TRX but did not have a compression release nor did the other motor I bought the juggling it reads 250 the one on my bike reads out of there 300 but when I tried to put the piston on the wrist pin was too big
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post #4 of 26 (permalink) Old 11-06-2017, 07:49 AM
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You have a 2wd bike correct? Sounds like someone has put a 250ES motor in it. The 250ES has a bigger wrist pin hole in connecting rod.

2016 Honda Pioneer 1000-5 Deluxe White
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2008 Honda Rancher 420 4x4
Work in progress

1998 Honda Trx300 4x4
317 motor, 54% Gear Reduction, EBC Clutches, Big Red Rear End, 2.75" Stretch, 350D Clutch Cover, Oil Cooler, Foreman 450 Clutch, Disc Brake Kit, 29.5 OG Laws

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post #5 of 26 (permalink) Old 11-06-2017, 08:14 AM
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You have a 2wd bike correct? Sounds like someone has put a 250ES motor in it. The 250ES has a bigger wrist pin hole in connecting rod.
he could also have a trx300ex cylinder on the motor as well ??!!.
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'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4, 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #6 of 26 (permalink) Old 11-06-2017, 08:16 AM
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op, post some pics of your atv, then we can narrow down your problem. pics of the motor will be lots of hep :-).

'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4, 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #7 of 26 (permalink) Old 11-06-2017, 08:16 AM
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Originally Posted by LBZ_Duramax View Post
You have a 2wd bike correct? Sounds like someone has put a 250ES motor in it. The 250ES has a bigger wrist pin hole in connecting rod.
he could also have a trx300ex cylinder on the motor as well ??!!.
Possibly but I doubt it. If it does that's extremely weird. Unless.... idk im stumped... we need some pics please!!

  • 2001 Honda TRX 400ex- Being Rebuilt
  • 2003 Honda TRX 416ex- Race Bike
  • 2000 Honda TRX 400ex- Parts Bike
  • 1999 Honda TRX 300ex
  • 2006 Honda TRX 300ex
  • 1988 Yamaha 225 moto 4
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post #8 of 26 (permalink) Old 11-06-2017, 08:19 AM
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Quote:
Originally Posted by LBZ_Duramax View Post
You have a 2wd bike correct? Sounds like someone has put a 250ES motor in it. The 250ES has a bigger wrist pin hole in connecting rod.
he could also have a trx300ex cylinder on the motor as well ??!!.
Possibly but I doubt it. If it does that's extremely weird. Unless.... idk im stumped... we need some pics please!!
these days ?..I don't put nothing past what ppl slap together !!..lmfaoooo.
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'89 trx350D foreman 4x4...'85 vf700c magna, '03 trx450fm foreman 4x4, 2015 Yamaha waverunner fx cruiser ho, '08 vt750c2 shadow spirit
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post #9 of 26 (permalink) Old 11-06-2017, 09:15 AM
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he could also have a trx300ex cylinder on the motor as well ??!!.
Possibly but I doubt it. If it does that's extremely weird. Unless.... idk im stumped... we need some pics please!!
these days ?..I don't put nothing past what ppl slap together !!..lmfaoooo.

Haha thats true!! One of my buddies put a CBR 1000cc on a Honda 400 ex frame lmao.... Ill try and find a pic
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  • 2001 Honda TRX 400ex- Being Rebuilt
  • 2003 Honda TRX 416ex- Race Bike
  • 2000 Honda TRX 400ex- Parts Bike
  • 1999 Honda TRX 300ex
  • 2006 Honda TRX 300ex
  • 1988 Yamaha 225 moto 4
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post #10 of 26 (permalink) Old 11-06-2017, 10:41 AM Thread Starter
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So that 250 e x have a larger wrist pin than a 300ex??
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