squid Posted January 8, 2010 Report Share Posted January 8, 2010 Hello out there. Ive just taken the tail end of my exhaust off and thick oily juice dripped out the end, which was a suprise. I stuck a chop stick in the pipe and theres a fair lot of dung in there. Can I put a cork in the end and pour Caustic soda in there and leave it to eat the crud over night or would this damage whats in there. Squid. Quote Link to comment Share on other sites More sharing options...
richty250e Posted January 8, 2010 Report Share Posted January 8, 2010 (edited) Hello in there squid, Well if we assume that you are working on the TY125 and it has a cylindrical exhaust, and you have taken off the whole rear silencer rather than just the baffle you can proceed as follows: The liquid you describe is two stroke oil that has passed through the engine and accumulated in the rear silencer. If you look towards the rear of the silencer on the underside you should find a screw which retains the separate baffle tube. You will need to remove the screw and then pull out the baffle tube. This can be difficult and you may have to apply heat using a blowlamp to free off the baffle tube. When you have got the baffle out you will see it consists of a perforated tube with a sound absorbing wadding wrapped around it. The wadding is there to absorb the sound energy and give you a quieter exhaust. I would assume that the wadding on your bike is saturated with oil so the best thing to do would be to remove it and then wash out the whole silencer and baffle with degreaser. If there are hard carbon deposits you can try your caustic soda process or just burn it off with a blowlamp (repaint needed afterwards). When you are ready to rebuild the silencer use new wadding (available from bike parts suppliers) and rewrap the baffle tube around the perforated section. You will need some stainless steel wire to wrap around the wadding to hold it in place. Put a little copper grease around the baffle cap where it slides into the silencer tube to stop it sticking in place and rebuild. Some TY125 had a different silencer (more box shaped) which did not have a separate baffle, if you have one of those then you can only clean it out using the caustic soda or blowlamp method, to repack the baffle you will have to split it and reweld. If the rear silencer is saturated with oil then it is likely that you will need to decoke the rest of the system, The front part of the exhaust cannot be dismantled but you can use the caustic soda or blowlamp technique to clean it out. Finally I would suggest you check the autolube system on your bike to make sure it isn't delivering too much oil, if you're running premix then check your fuel/oil ratio is suitable. Hope this helps Edited January 8, 2010 by richTY250E Quote Link to comment Share on other sites More sharing options...
squid Posted January 8, 2010 Author Report Share Posted January 8, 2010 Hello Rich TY250e Thats a brilliant reply, very much appreciated. Thanks for such a solid lump of info. I'll get at it tomorrow. Joy unto thee. Cheers Bon nuit. Squid. Quote Link to comment Share on other sites More sharing options...
squid Posted January 8, 2010 Author Report Share Posted January 8, 2010 Sorry another probably stupid question by me but I've got 2 rubber o rings on the end of me silencer pipe, 1 in the groove and 1 butted up against the 'flange' if you get me meaning. Should there be 2 in there as I can only see one in me manual. Also when replacing these O rings or ring is there just one size that does the job as the 1 touching me flange is stretched somewhat. Squid. Quote Link to comment Share on other sites More sharing options...
richty250e Posted January 8, 2010 Report Share Posted January 8, 2010 Bon jaw Squid, As far as I am aware there is only one o ring on the silencer pipe joint (in the groove). The Yam part number is 93210-19026. You might also want to consider using some Loctite sealer on the joint if it is corroded or worn. Loctite 5920 is a copper rich silicon sealer that can cope with exhaust gas temperatures, it is designed for glass oven doors etc. Ory Vwar! Quote Link to comment Share on other sites More sharing options...
mattylad Posted January 12, 2010 Report Share Posted January 12, 2010 If you read french look at Mijossi.com which has an article to improve performance of a TY125 which also includes shortening the rear exhaust perforated tube or even better using the centre core from a TY250 which is significantly larger. Quote Link to comment Share on other sites More sharing options...
squid Posted January 12, 2010 Author Report Share Posted January 12, 2010 Hello Mattylad. I took a peak before I picked up me TY but forgot about that site. Thanks for the prompt. Cheers Squid. Quote Link to comment Share on other sites More sharing options...
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