typerossy Posted October 10, 2017 Report Share Posted October 10, 2017 Can anybody tell me if it is ok to run with piston slap, bought this bike as a non runner, got it started but its not sounding right. I searched online and a lot of people say it's piston slap it's still OK to ride as a lot of bikes that year are like this. Is this correct? It's a 290 2004. Quote Link to comment Share on other sites More sharing options...
huski Posted October 10, 2017 Report Share Posted October 10, 2017 Can you post a video so we can hear it? Quote Link to comment Share on other sites More sharing options...
nzralphy Posted October 10, 2017 Report Share Posted October 10, 2017 Are you sure it is slap? Yes you can. In fact you can until the piston and barrel are both stuffed. Quote Link to comment Share on other sites More sharing options...
taffe Posted October 10, 2017 Report Share Posted October 10, 2017 Cheaper to fix the slap than what could follow, l recon. Taff 1 Quote Link to comment Share on other sites More sharing options...
typerossy Posted October 10, 2017 Author Report Share Posted October 10, 2017 Not sure how you attach a video, it's not allowing me everytime I try. Quote Link to comment Share on other sites More sharing options...
brownie001 Posted October 10, 2017 Report Share Posted October 10, 2017 Put the video on Youtube and post the link to it 1 Quote Link to comment Share on other sites More sharing options...
typerossy Posted October 10, 2017 Author Report Share Posted October 10, 2017 2 hours ago, typerossy said: Not sure how you attach a video, it's not allowing me everytime I try. Quote Link to comment Share on other sites More sharing options...
typerossy Posted October 10, 2017 Author Report Share Posted October 10, 2017 Figured it out, here it is Quote Link to comment Share on other sites More sharing options...
jimg Posted October 10, 2017 Report Share Posted October 10, 2017 I'd like to share what I've done to six of my older bike when there is too much piston to barrel clearance and there is "slop". As long as the piston and barrel are not over @20 thousandths (diameter or total) out of specification, I have my pistons coated with an abradable power coating (APC), hone the cylinder, and put new rings in it; for a couple, I had to get a 1 over sized rings and file down ends to get a perfect fit/end gap. I cannot say how good this stuff works, it's quite amazing and very cost effective; usually under $50 (USD) plus cost of rings. In fears of having this post deleted, I won't get into all the technical information about this product, so please don't think this is an advertisement for this product, as I have only been a customer of the company who does this. The company that does this is called Line2line Coatings and located in the USA. They have a great deal of technical information available on their website and on Youtube. I cannot stress how great this product works. I had a (nearly impossible to find) VERY scuffed BetaTR34 piston (had to beat it out) that most would NEVER consider putting back in the bike coated with APC. I also had a ring made for it and honestly, the bike now sounds better than new and outstanding compression. I've coated original Yamaha TY's, Bultacos, Tiger Cub, Suzuki TM, and the BetaTR34 pistons, with outstanding results in all of them. Regards. Quote Link to comment Share on other sites More sharing options...
typerossy Posted October 10, 2017 Author Report Share Posted October 10, 2017 Anybody got any experience with sherco 290 piston slap could say if the above video I posted sound like it? Quote Link to comment Share on other sites More sharing options...
2stroke4stroke Posted October 10, 2017 Report Share Posted October 10, 2017 A recording always sounds worse than the real thing so it's hard to tell. Quote Link to comment Share on other sites More sharing options...
huski Posted October 10, 2017 Report Share Posted October 10, 2017 If the bike is in good shape and you like it,get the cylinder replaced and a new piston.If it needs a load of work,such as clutch,suspension linkage and all the consumables it could get expensive 1 Quote Link to comment Share on other sites More sharing options...
copemech Posted October 12, 2017 Report Share Posted October 12, 2017 Sounds pretty much like a bad case of the slap to me. I have tried piston coating in the past, but I had no luck. Depending upon where you are, som places keep some exchange cylinder/piston kits ready to go. The tolerances on these are extremely critical and they must be matched. 1 Quote Link to comment Share on other sites More sharing options...
typerossy Posted October 12, 2017 Author Report Share Posted October 12, 2017 (edited) 17 hours ago, copemech said: Sounds pretty much like a bad case of the slap to me. I have tried piston coating in the past, but I had no luck. Depending upon where you are, som places keep some exchange cylinder/piston kits ready to go. The tolerances on these are extremely critical and they must be matched. I just went for that option today, exchange cylinder and piston. Sent them off today so hopefully I will receive the replated cylinder and new piston early next week, not cheap but hopefully it will do the trick. I will post the outcome once i've fitted them. Edited October 12, 2017 by typerossy Quote Link to comment Share on other sites More sharing options...
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