seavoyage Posted March 24, 2013 Report Share Posted March 24, 2013 Need - Help 2002 TXT Pro 200 with clutch upgraded to 2004. I often have difficulty shifting down from 2nd to 1st gear. Clutch is fine 1st to 6th and back down, but I often cannot shift into 1st. Running Dexron III ATF. We first suspected damage to shifter mechanism, took apart to inspect, no issues. Replaced OEM shifter with a notched lever as 'breakaway insurance.' I've seen this video, but it doesn't describe my situation: http://smg.photobucket.com/user/2Ply/media/Gas%20Gas%20300%20Transmission%20Repair/GG-GearProblem.mp4.html Next step is to split the cases: replace shift linkage (part #14) and maybe shift fork? Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 25, 2013 Report Share Posted March 25, 2013 Did you watch the part of the video to adjust the shift cam? 1 Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 25, 2013 Report Share Posted March 25, 2013 Wrong video, you need to watch jim snell`s engine rebuild video. Quote Link to comment Share on other sites More sharing options...
seavoyage Posted March 25, 2013 Author Report Share Posted March 25, 2013 Did you watch the part of the video to adjust the shift cam? Thanks - I have viewed Jim Snell's video. I opened the clutch cover and inspected the shift cam; shifts up and down absolutely fine. Splitting the cases is still in my comfort zone, I just did my Gasser EC300. When the engine is running, and warmed up: shift up from 1st to 2nd is no problem, no false neutrals, but frequently cannot shift from higher gears back to 1st. Kill switch and dead engine: shifts right back into 1st. and neutral. Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 25, 2013 Report Share Posted March 25, 2013 It may shift fine, but did you see the part of adjusting the cam? It was quite a problem on the `02`s. If you split the cases it is very easy to check the forks and shaft. The `02 had a very weak shift drum that you might consider replacing. Quote Link to comment Share on other sites More sharing options...
laser1 Posted March 25, 2013 Report Share Posted March 25, 2013 Try the centering spring adjustment 1st - thats what its for. You cant tell squat by looking at it. 1 Quote Link to comment Share on other sites More sharing options...
1234567qw Posted March 25, 2013 Report Share Posted March 25, 2013 It will be a bent fork you will need to split crankcases when you spin gearbox look for a wobble on forks .That was problem with mine cheers. Quote Link to comment Share on other sites More sharing options...
sting32 Posted March 26, 2013 Report Share Posted March 26, 2013 I think you have to make sure the cam "centering spring" adjustment it perfect, and it is easy to do, just need relatively quite and a couple of minutes. I had trouble shifting new bikes a couple times, we do that adjustment and all is good. Wont have to be a bent fork either, I wont say it couldn't be.... but the part in picture show in OP as parts 12,13,14 can get broken or bent, I have had that happen more than once on older bikes. Plus this diagram is for a newer bike, I think in 06 when they finally put the part (#11 referred to as a 'fuse' or fusible link?, or sacrificial part that breaks when too much pressure on shift lever) I had to fix that 1 times on my Son's bike, he clipped a stump trying to save a clean... His toe was more of a problem, lol Anywho, if the 12.13.14. assembly gets bent like I have seen it happen, which means the drum wont turn far enough, and the drum that moves the forks... Quote Link to comment Share on other sites More sharing options...
ham2 Posted March 26, 2013 Report Share Posted March 26, 2013 It will be a bent fork you will need to split crankcases when you spin gearbox look for a wobble on forks .That was problem with mine cheers. Sometime you need a sheet of glass (or an engineers marking-out table) to lie the forks on to spot the distortion. Quote Link to comment Share on other sites More sharing options...
lineaway Posted March 27, 2013 Report Share Posted March 27, 2013 Actually the proper way to check the shift forks is to remove them and the shaft. Put them on the shaft bachwards and they should seat exactly flush to each other. (lay flat to each other) If that came out sounding right? 1 Quote Link to comment Share on other sites More sharing options...
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