hollows Posted January 3, 2011 Share Posted January 3, 2011 I have a 70cc tuned yamaha aerox. Everything was running fine till few days back when i decided to take it in a shop nearby to have the spark plug changed.They called my and sad that they've putted a new plug and i thought that was it. My scooter worked just fine with the new spark plug when yesterday i was driving around 80kmh and i heard a bang so i pulled over...The spark plug was blown out but there wasnt much damage on it just a tiny dent on the bottom...so i guess the piston must have hit it couse when i compared it with the stock one it was much longer and i have no idea how they overlooked that...I've put my spare plug and my scooter is running fine once again but im worried that the piston might be damaged... is it a serious problem or it could run as good as it was before? Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 3, 2011 Moderator Share Posted January 3, 2011 The bang was possibly the plug hitting something as it left the plug hole. If it runs nice and quiet now with the old plug things cannot be so bad eh? I suggest you keep the plug they fitted and if it's the wrong one you should take it up with the shop. The very least they can do is refund you in my opinion. If they wont just mention the words 'trading standards' to them as you leave. Link to comment Share on other sites More sharing options...
hollows Posted January 3, 2011 Author Share Posted January 3, 2011 Well i can't feel any difference on acceleration or on top speed.And i think the spark plug hit the bottom of the seat so that can be the noise i heard.With the old spark plug the sound is the same as it was before.I'm just worried couse if the piston is damaged i would need to spend alot of money to have it changed.I will visit the shop again be sure of that haha:) thx for the replay Link to comment Share on other sites More sharing options...
up.yours Posted January 3, 2011 Share Posted January 3, 2011 i would be livid and demand a new bike,,,,, ? but ,,your not me... .... Link to comment Share on other sites More sharing options...
Joshua2 Posted January 5, 2011 Share Posted January 5, 2011 The spark plug was blown out but there wasnt much damage on it just a tiny dent on the bottom...so i guess the piston must have hit it couse when i compared it with the stock one it was much longer and i have no idea how they overlooked that...I've put my spare plug and my scooter is running fine once again but im worried that the piston might be damaged... is it a serious problem or it could run as good as it was before? I would be furious if they had dented my bottom! :angry: More worrying to me is if there is any stripped or damaged threads in the cylinder head. I'd stay well clear of that garage. ATB J Link to comment Share on other sites More sharing options...
hollows Posted January 5, 2011 Author Share Posted January 5, 2011 They sad that the plug was a bit longer but that shouldn't be the problem couse they did that on another aerox and nothing happened .. I just know that they screwed up but can't take the blame. Thanks god that the piston or the cylinder head are not damaged couse as i see it i would have payed for the new parts. Link to comment Share on other sites More sharing options...
Moderator Airhead Posted January 5, 2011 Moderator Share Posted January 5, 2011 God knows where you took it, never go there again for anything is my advice. I dont agree you would have to pay for any damage they caused through fitting incorrect parts either. Link to comment Share on other sites More sharing options...
up.yours Posted January 6, 2011 Share Posted January 6, 2011 is it possable the person who owned the bike before you may have fit a smaller plug, and the garage replaced it with the correct size, and maybe the thread was already worn causing it to blow out. Link to comment Share on other sites More sharing options...
hollows Posted January 6, 2011 Author Share Posted January 6, 2011 Well you can be correct..I did buy it from another guy who worked on it for years. And that can explain why it blew out and didn't cause any damage.. well thanks for the post and ill take it to another shop just to be sure of which plug should i use Link to comment Share on other sites More sharing options...
2 Wheels Posted January 6, 2011 Share Posted January 6, 2011 This is exactly why i dont let anyone else near my bikes,,,,,,, Link to comment Share on other sites More sharing options...
hollows Posted January 7, 2011 Author Share Posted January 7, 2011 Haha thats the worst part of the story it was just a spark plug.. changing it would have taken me 2 minutes but for god knows what reason i decided to take it in a shop: Link to comment Share on other sites More sharing options...
up.yours Posted January 8, 2011 Share Posted January 8, 2011 lazyness Link to comment Share on other sites More sharing options...
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