Motorcycle Repair: Honda tranny Problem, honda vf750c, v45 magna

Question
I have a 82 Honda Magna that pops out of 2nd gear. I have replaced the shift fork and now at least it goes into 2nd gear. However I need some help on what I should be looking for to determine what part or parts need replaced now. Is there something in the shifting drum I should be measuring or in the gear clusters? My manual doesn't say much about it. Any help would be greatly appreciated. I have already had the engine in and out 4 times now.....OMG

Answer
Wow! You are an expert at Magna Transmissions now! Well, almost! Correct gear shifting is a matter of good shift forks with minimum side play in the gear slot ring, an undamaged shift drum and gears that will engage with their next door neighbor cleanly and smoothly. The gears have shift dogs (protrusions) and holes in the adjacent gear. If the shift dogs are rounded off on the tips or the holes are enlarged or worn at the edges, the gear dogs won't stay inserted into the holes.

You need to inspect each gear for wear and damage. Once they start jumping out of gear, they start getting damaged rather quickly. Look for excessive backlash in the shift fork/gear slot ring. The gearsets have thrust washers and snap rings to hold everything into alignment with each other.

http://www.cmsnl.com/honda-vf750c-v45-magna-1983-us_model7608/partslist/E++14.ht...  for details about the sequence of parts.

Obviously all the shift selection parts need to be in top shape:
http://www.cmsnl.com/honda-vf750c-v45-magna-1983-us_model7608/partslist/E++15.ht...  Any wear in the shift drum stopper arm rollers, drum selector pins and shift shaft can contribute to shifting inaccuracies.

You should be able to turn the transmission shafts and observe how each gearset is engaged and that there is sufficient engagement between all the gear components. If the engagement is insufficient, you may need to add shims/washers or replace the worn parts, so that each and every gear selection is the same.

Be sure that your clutch is releasing completely when you make your shifts, too.

http://www.magnariders.com/ for more assistance.

Bill Silver