maxicosi Posted April 17, 2011 Report Share Posted April 17, 2011 Hello everyone, I bought a YAMAHA TY 250 1985 but it has no spark. I think that the cdi-unit is defective. I've checked the resistance of the source coil and that's a bit off too (160 ohm in stead of 240 ohms). also I found a crack in the high tension coil but that measures out fine. Can anybody help me? thanks! Quote Link to comment Share on other sites More sharing options...
alan_nc Posted April 17, 2011 Report Share Posted April 17, 2011 The two coils are "off the shelf" items so it might be easier to start there. Look up the part number of the cdi and see if you can find other bikes that used the same unit. I have never been able to find the specs on a Yamaha cdi unit so they are difficult to substitute. Ebay may be your best bet. Quote Link to comment Share on other sites More sharing options...
bengtphorqs Posted May 7, 2011 Report Share Posted May 7, 2011 Here is a good source for Yamaha parts. http://www.boats.net/parts/search/Yamaha/Motorcycle/1985/TY350N%20-%20TRIALS/ELECTRICAL1/parts.html I notice you mention a TY250, but the only trials model shown is a TY350. The cdi is obsolete but it give you a starting point for part numbers in your search. Look for other Yamaha models of that era and you may find what you need. Good luck Quote Link to comment Share on other sites More sharing options...
fergie Posted May 31, 2011 Report Share Posted May 31, 2011 my 84 has the same problem. little or no spark. how do you test the coil? Quote Link to comment Share on other sites More sharing options...
maxicosi Posted June 15, 2011 Author Report Share Posted June 15, 2011 Hello, In this link you will find a manual with all the information that you need. http://northover.com/Bike/YamahaTYManual.htm good luck! my 84 has the same problem. little or no spark. how do you test the coil? Quote Link to comment Share on other sites More sharing options...
Recommended Posts
Join the conversation
You can post now and register later. If you have an account, sign in now to post with your account.