valdes Posted March 24, 2006 Report Share Posted March 24, 2006 Hi, I just purchased a TXT 50 Boy and installed a 70 cc. kit on it. Does anyone know what jetting to use with this bigger motor? What mods could be made to the transmission to make it more direct in order for the Child to get power sooner and not wait until it revs. up like crazy. Quote Link to comment Share on other sites More sharing options...
tobster Posted March 24, 2006 Report Share Posted March 24, 2006 re the lack of low down power, I fear you (or rather the child) may be stuck. Our TXT80 is gutless at low revs & eventually gets going, almost like turbo lag. My boy is not finding it the easiest bike to ride having changed last year froma ty80, though some of that is because it is a much bigger bike. Our bike also runs mega rich when used as a trials bike (i.e. it's fine when you do 1/4,1/2 and full throttle plug chops) so I have been tinkering with the carb to get it to run better i.e leaner. I personally would try the carb settings for the 50 and see how it runs before you start buying bigger jets/slides and needles. A short ride to these carb settings will not damage the engine - do a plug chop and see what the plug looks like. Also run the fuel:oil ratio at 70:1. Good luck Quote Link to comment Share on other sites More sharing options...
tobster Posted March 24, 2006 Report Share Posted March 24, 2006 also for better/more responses try posting in the gas gas section though I guess if you do that now then admin might flick your ear for repeat posting? Quote Link to comment Share on other sites More sharing options...
nsaqam Posted March 24, 2006 Report Share Posted March 24, 2006 I had one of these TXT50's for a while until it was stolen by some loser. The best thing you can do for these is put on a 5 or 6 tooth larger rear sprocket. Although I didn't get a chance to try it some say that adding a clutch plate or thicker clutch plates brings the centrifugal clutch into play alot sooner and can also be made to be manual clutch only. Don't know the specifics of this though. Quote Link to comment Share on other sites More sharing options...
nsaqam Posted March 24, 2006 Report Share Posted March 24, 2006 There is a thread in the Gas Gas specific forum dealing with these issues. It includes part numbers. Quote Link to comment Share on other sites More sharing options...
tomsdad Posted March 24, 2006 Report Share Posted March 24, 2006 Ran one of these for 2 years in the youth Nationals. Put the big rear sprocket on and wind up the carb idle until you have to use the brakes to stop the thing going forward. Now back of the idle a tad and BINGO no lag and easy wheelies care of the new gearing, Several people tried converting to a manual clutch but none with great success. Have fun and enjoy the electrics!!!!! Quote Link to comment Share on other sites More sharing options...
nsaqam Posted March 25, 2006 Report Share Posted March 25, 2006 Excellent info TomsDad! Thanks. Now what is this thing about the electrics? Fan, ignition or what? Quote Link to comment Share on other sites More sharing options...
tomsdad Posted March 25, 2006 Report Share Posted March 25, 2006 Sold our TXT Boy 18 months ago and I've just found the fan in the back of the van !!!! Took it off because it didn't work and never bothered replacing it. Although I always carried a bottle of water with me when the weather was hot and there was a bit of queuing. Mike Quote Link to comment Share on other sites More sharing options...
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