pumpkinboy1991 Posted March 29, 2013 Share Posted March 29, 2013 Hi all, had a YZF 250 for a few years now and only now thought of questioning whether it was sold to me correctly as a 2005 model (I have my doubts). It was my first serious motocross bike and I was "young and naïve..." so I didn't look thoroughly enough for the tell tale signs of just how to make sure you are getting what you have been advertised. I'm hoping someone on here can identify the bike year, I have my suspicions it is actually a 2003 model after some google searches, but where better to ask for proof than on the Yamaha Owners forum!! Regardless of age, I really enjoy riding it, I'd just prefer to know exactly what I have Any advice, info would be appreciated. PS it does need some TLC so not too many sniggers please! Chassis Number: *CG14C-00XXXX* Engine Number: *G329E-00XXXX* http://www.flickr.com/photos/71867429@N07/8599918165/in/photostream/ http://www.flickr.com/photos/71867429@N07/8599916131/in/photostream/ http://www.flickr.com/photos/71867429@N07/8601014472/in/photostream/ http://www.flickr.com/photos/71867429@N07/8601013866/in/photostream/ http://www.flickr.com/photos/71867429@N07/8601013196/in/photostream/ http://www.flickr.com/photos/71867429@N07/8601012706/in/photostream/ http://www.flickr.com/photos/71867429@N07/8601012070/in/photostream/ Link to comment Share on other sites More sharing options...
Moderator Airhead Posted March 29, 2013 Moderator Share Posted March 29, 2013 do you need to buy anything for it? Link to comment Share on other sites More sharing options...
pumpkinboy1991 Posted March 30, 2013 Author Share Posted March 30, 2013 I don't need to buy anything crucial at the moment, but I would like to do some upgrades when I rebuild it at the end of this year (it's a bit rusty in places as you can see) so I would need to know which year it is to select the correct things I would like to buy. Link to comment Share on other sites More sharing options...
dt502001 Posted March 30, 2013 Share Posted March 30, 2013 Just run the frame # through a dealer they can tell you quick. As far as parts 2002-10 same valves ,piston,gaskets,ect cams differ but any year will work,wr cams will give more bottom-mid power. Dosn't look like you have done much service to the bike you should check the valve clearence ASAP,if the bike has 100hrs since it's last topend rebuild it needs to be done and you wil be looking at a 1000.00 min if the cylinder needs replating then add 300. These are race eng and must be treated as such,, neglecting it will cost you LARGE to the tune of 3000.00 when a valve drops and they do break quite easy. Link to comment Share on other sites More sharing options...
pumpkinboy1991 Posted March 31, 2013 Author Share Posted March 31, 2013 Thanks for the info dt50, it is much appreciated. I have been carrying out routine maintenance, such as oil/filter changes and I have also been regularly checking the valve clearance. I was warned before I bought the bike that the tolerances are small as it is a racing spec bike, so thankfully I have been trying to keep on top of the basics. As for the cylinder lining, I've never had the full head off to inspect or rebuild it, so it's probably something I should do in that case. I don't race the bike, just trail riding and recreational MX at the local track but I'm never putting it through its paces and thrashing it the way more serious racers would, so I imagine that stands in my favour. What do you think? Link to comment Share on other sites More sharing options...
dt502001 Posted March 31, 2013 Share Posted March 31, 2013 So basicaly what your sayin is you have no idea when the last rebuild was right?And you have put a 100hrs on it If thats the case then you better open it up and check everything the service intervals are check and replace as nessary ever 600 miles or fifth race.That includes Valve clearence every 3rd race,, stem and seat every 5th,springs,lifters,cams,timming chain and sprockets. Piston check every 5th race for cracks -replace rings new head gasket every 5th race. re tighten rotor nut every 5th crank and bearings inspect every 5th transmission bearings 5th The list goes on but this is straight from the yamaha service manual as you can see they don't expect it to run long before something will give up even if you not racing 600 miles is 600 miles of wear and tear. My wr has a tripmeter that suprise only goes to 999kms ( 600miles) so basicaly rebuild set to 0 and rebuild when it rolls over to 0 again. So it's upto you ride it hope it dosen't blow up or service it and know all is good. Link to comment Share on other sites More sharing options...
pumpkinboy1991 Posted March 31, 2013 Author Share Posted March 31, 2013 Yeah, you're right - I doubt I have put 100 hrs on it as I very rarely get the chance to take it out but having said that I don't know when the last rebuild would have been before I bought it and as you say - better safe than sorry. So I'll open it up before it goes out again, thanks again for the info! Link to comment Share on other sites More sharing options...
Grouch Posted April 1, 2013 Share Posted April 1, 2013 So basicaly what your sayin is you have no idea when the last rebuild was right?And you have put a 100hrs on it If thats the case then you better open it up and check everything the service intervals are check and replace as nessary ever 600 miles or fifth race.That includes Valve clearence every 3rd race,, stem and seat every 5th,springs,lifters,cams,timming chain and sprockets. Piston check every 5th race for cracks -replace rings new head gasket every 5th race. re tighten rotor nut every 5th crank and bearings inspect every 5th transmission bearings 5th The list goes on but this is straight from the yamaha service manual as you can see they don't expect it to run long before something will give up even if you not racing 600 miles is 600 miles of wear and tear. My wr has a tripmeter that suprise only goes to 999kms ( 600miles) so basicaly rebuild set to 0 and rebuild when it rolls over to 0 again. So it's upto you ride it hope it dosen't blow up or service it and know all is good. Wow seems very expensive even if you do the work yourself the parts will cost a bit. Link to comment Share on other sites More sharing options...
pumpkinboy1991 Posted April 1, 2013 Author Share Posted April 1, 2013 Yeah it certainly seems that way! A new cylinder head gasket alone is £35 lol, which has to be replaced every time you take the head off! hope my numbers come up on the lotto this week! Link to comment Share on other sites More sharing options...
dt502001 Posted April 1, 2013 Share Posted April 1, 2013 Well like they say it cost 10x to build a bike from parts then to buy new assembled,thats why old dirt bikes are cheap. You were going to do it later this year just the time frame got moved up not the cost. Link to comment Share on other sites More sharing options...
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