Question about 2003 Suzuki RM 125

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My 2003 rm 125 transmission slips out of gear.

My bike shifts into first or sixth. All the other gears slip out. Both the dogs and the cogs look good with minimal wear and the shifting forks are not bent. I was told the snap rings need to be changed but do I need to change them if I never took them off in the first place? I did split the case in half to examine it because a screw came loose. I replaced the screw with no change. Its now apart and I can not seem to find anything wrong? Please help.

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Im having the same problem with my 2003 rm 125, tombones49 is wright about the shift forks.

Posted on Jun 14, 2010

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The snap rings should be fine. Removing them does not make them bad if done properly. If you can actually see the bend in a shift fork that is known to be bent, you are a rare man. Put a bent fork next to a new fork and you can't see the difference. A bent shift fork doesn't necessarily look bent. There are three shift forks in the tranny. Replace all three and there will be no doubt as to " did I change out the right fork ". Assuming you have no repair manual, go to the site below to see a parts diagram for your bike.
http://www.babbittsonline.com/pages/parts/viewbybrand/parts.aspx

Posted on May 27, 2010

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Related Questions:

1 Answer

Transmission will shift into, or out of gear, but will not spring back into position. For instance. If you want to shift into first gear, you have to push down on the shift lever, then back up just a...


If shaft and lever is undamaged, more than likely the gear selector shaft spring is misaligned or broken. Place in neutral. Remove pinch bolt from gear lever and remove lever. Undo covers and sprocket for access to selector mechanism.

The link below has exploded view diagrams and part numbers/names for the whole bike in sections.

Gear shifting is 6th from bottom of list.
Goodluck and Cheers.

http://www.motorcycle.mrsuzukiparts.com/2003-RM125.htm

May 19, 2010 | 2003 Suzuki RM 125

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My rm 125 is jumping out of gear?


Do you "kick shift" a lot? (shift at high rpm without the clutch) or did the gear box run low on oil at any point that you know of? If so the syncros in the gear box may be worn. Probably not a do it yourself fix, unless you are familiar with this.
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1978 suzuki dr 370 motorcyle just started having a problem. When in neutral the transmission makes a popping type noise intermittenly. when this occurs it tries to jump into gear. ant idea


The popping noise is gear dogs trying to engage a gear. You did not say that the bike doesn't shift smoothly so I would tend to rule out a bent shift fork. The neutral stopper pin may be worn or the stopper spring or other springs may be broken (see diagram). Another possibility is a broken stationary gear circlip which would let the gear wander a bit on the shaft. most the parts are available at Babbitt's. Go to www.babbittsonline.com/parts/viewbybrand/parts.aspx

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No this is a gearing problem. I have the same problems. On a bike there are gears in the transmission the low parts in a gear are called windows and the high parts are called dogs. When the edges of the dogs get rounded off due to improper shifting it will slip out of gear and or not go into gear at all. You have to have the gears replaced. Its $500 if you know someone $900 if you dont.

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I have a suzuki rm 125 1994 model when i pull the clutch lever in to put it in gear the clutch doesnt work t jst crunches into gear


Adjust the clutch cable to allow about 1/4" free play at the end of the clutch handle. Don't put the bike in gear until the rpms are near idle speed. The clutch is working fine if the bike does not lurch forward when going into gear at idle speed. Dirty, gritty oil in the gearbox can make the clutch grab. Consider changing oil if grabbing is the problem. The "crunch" you hear is the slider gear engaging into the driven gear. The higher the engine speed when being put into gear the louder the crunch. The slider gear engaging "dogs" can break. Crunching into gear is hard on the gears.

Post a comment to let me know how you come out on this.

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I am a salesman from www.joyguy.com We mainly trade flashlight and other electronics. Feel free to contact us if you ar einterested in it, thanks.

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Honda cbr900rr transmission , slipping out of 2nd gear into neutral, does engine need to be pulled apart to get to gearbox


Hi Jason..

I had exact same problem.. bottom line I had to replace selector forks (all three) and second gear cog.. If u do replace a gear cog then please take a tip from me (lesson hard learn't). Have all your gears undercut at the same time or it will slip out of another gear.. I got my bike back after 2 nd gear done and on the same day 3 rd gear started to slip. Had to send bike back and have all the cogs undercut... Now its fine.

And yes u do need to remove motor to open gearbox and u will need to replace gaskets..

Doug

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