Morpheuz Posted January 8, 2012 Share Posted January 8, 2012 Hi, I like to do my own maintainence, I have a dragstar 125, and its 2004. Its engine runs nice and smooth, but there is a slight ticking, nothing major, also there is like a very slight whiring sound, I'm just putting that down to the engines normal noise, seeiing as though this bike is more technical than my other chinese bike, I dare not open it up unless I really have to. Has anyone ever been into the dragstars OHV? does it need checking often? Cheerz Link to comment Share on other sites More sharing options...
JimR Posted January 8, 2012 Share Posted January 8, 2012 I would guess the bike to be OHC and not OHV .. on saying that the smaller engines do require cam chain & valve adjustment in a shorter time span .. buy a service manual Link to comment Share on other sites More sharing options...
neversaydie Posted January 8, 2012 Share Posted January 8, 2012 Check and adjust (if reqd) every 6,000 kms Intake 0.08 - 0.12mm Exhaust 0.10 - 0.14mm Use the search function and locate both the owners manual and the workshop manual. If you cant find em, let me know and I'll mail em to you Link to comment Share on other sites More sharing options...
Morpheuz Posted January 8, 2012 Author Share Posted January 8, 2012 Ive got the manual, all it does is tell you to take it to a yamaha dealer all the time, I'll have a look for it if not I'll let you know, cheers fellas. Link to comment Share on other sites More sharing options...
JimR Posted January 8, 2012 Share Posted January 8, 2012 Ive got the manual, all it does is tell you to take it to a yamaha dealer all the time, I'll have a look for it if not I'll let you know, cheers fellas. so owners manual not service manual ? buying a service manual will help you out loads. a word of caution obtaining copyright content from a party (other than from the copyright holder) may break some laws Link to comment Share on other sites More sharing options...
Moderator DirtyDT Posted January 8, 2012 Moderator Share Posted January 8, 2012 Adjust the tappets. Pretty simple to do providing they are not shimed. Link to comment Share on other sites More sharing options...
Morpheuz Posted January 9, 2012 Author Share Posted January 9, 2012 Yeah just owners manual, I'll get the service one, never knew there was one. Link to comment Share on other sites More sharing options...
neversaydie Posted January 9, 2012 Share Posted January 9, 2012 Workshop manual/service manual, its the same thing. Takes you through it step by step Link to comment Share on other sites More sharing options...
Morpheuz Posted January 20, 2012 Author Share Posted January 20, 2012 I have just the owners manual, the 125 is an OHV, no cam just some valves with pushrods, I have downloaded the Service one from the internet, I recon the tappets are fine, I may take it in for a tappet adjustment, as Everything I've tried to do on my own so far has resulted in me finding a deteriorated part or stuck bolts. Link to comment Share on other sites More sharing options...
gemini Posted January 21, 2012 Share Posted January 21, 2012 the 125 is an OHV, no cam just some valves with pushrods, . Air-cooled, 4-stroke, SOHC, yes it has cams and chains Link to comment Share on other sites More sharing options...
Morpheuz Posted January 21, 2012 Author Share Posted January 21, 2012 Air-cooled, 4-stroke, SOHC, yes it has cams and chains So where the hell is the chain that goes to the top then? I'd love to know how they got a chain to go up the side of a v-twin to reach both rocker covers. I don't get it Link to comment Share on other sites More sharing options...
YPVS TONE Posted January 21, 2012 Share Posted January 21, 2012 Have a look here ; http://www.gileraspares.co.uk/spares/epc2.asp?ModelID=9738&pageID=5&uid=0 Shows a single crankshaft with a sprocket on each end driving two seperate camchains to drve the seperate camshafts. Tony Link to comment Share on other sites More sharing options...
gemini Posted January 21, 2012 Share Posted January 21, 2012 So where the hell is the chain that goes to the top then? I'd love to know how they got a chain to go up the side of a v-twin to reach both rocker covers. I don't get it Link to comment Share on other sites More sharing options...
Morpheuz Posted January 21, 2012 Author Share Posted January 21, 2012 Right then, I stand corrected! Link to comment Share on other sites More sharing options...
Morpheuz Posted March 20, 2012 Author Share Posted March 20, 2012 Right, now its getting hotter I've had her out and she is definately tappy upstairs, I'm not worried about the chains, as it sounds as if its the clearences between the lobes and the valves, I dont see any adjustment for the valves though? Link to comment Share on other sites More sharing options...
jimmythemoonlight Posted March 21, 2012 Share Posted March 21, 2012 Hi, I like to do my own maintainence, I have a dragstar 125, and its 2004. Its engine runs nice and smooth, but there is a slight ticking, nothing major, also there is like a very slight whiring sound, I'm just putting that down to the engines normal noise, seeiing as though this bike is more technical than my other chinese bike, I dare not open it up unless I really have to. Has anyone ever been into the dragstars OHV? does it need checking often? Cheerz Hi, I like to do my own maintainence, I have a dragstar 125, and its 2004. Its engine runs nice and smooth, but there is a slight ticking, nothing major, also there is like a very slight whiring sound, I'm just putting that down to the engines normal noise, seeiing as though this bike is more technical than my other chinese bike, I dare not open it up unless I really have to. Has anyone ever been into the dragstars OHV? does it need checking often? Cheerz morphheuz....i too have a 2004 dragstar as is well documented upon this here site, i would just like to say any noise comming from the engine has got to be a good one...i have had mine for a number of months now and i still dont know what it sounds like...besides popping noises and front piston parrrrps................just as a matter of interest has anybody got a clue how much these things were to buy new in the day???was it in comparison to other 125's a top end of the market machine ?? Link to comment Share on other sites More sharing options...
Morpheuz Posted March 21, 2012 Author Share Posted March 21, 2012 Tapping as far as I know is bad in any OHC, I don't think these 125's are self adjusting, so I'm hoping there is some sort of gap I can adjust. Either that or my lobes are pitted. Back in the day, I think they may have been a few grand brand new. Noises are a great indicator, keep them all in check and run a good 10w-40 oil and the bike should be smooth, after that I run a certain detergant engine cleaner through my fuel, and it becomes quiet and smooth even more so. If its still making noises, and its not your bottom end adjustments, then there is probably damage somewhere, or something needs replacing. I am not familiar with these OHC's so I'm just wondering what I can learn about them, in order to quieten them down, I don't trust mechanics, no matter how good they are, because when you ask for something done, they follow dealer specs, if it was blowing up, and the service book said not to check for another 1000km, they would leave it.... they all piss in the same bucket of shit. Its so there is more chance if them getting to replace a part and charge a fortune. Link to comment Share on other sites More sharing options...
jimmythemoonlight Posted March 24, 2012 Share Posted March 24, 2012 Check and adjust (if reqd) every 6,000 kms Intake 0.08 - 0.12mm Exhaust 0.10 - 0.14mm Use the search function and locate both the owners manual and the workshop manual. If you cant find em, let me know and I'll mail em to you can anybody please explain ref these clearances ...these are the size of the gap..right?? what makes me scratch my head is why is there 2 settings ... or is it the actual tollerance if so for example the intake at 0.08mm-0.12mm to me thats 2 different settings...would it be correct to set it at 0.10mm which is bang inbetween ?????? Link to comment Share on other sites More sharing options...
Paulwhite Posted March 25, 2012 Share Posted March 25, 2012 anywhere in between 0.08mm-0.12mm thickness Link to comment Share on other sites More sharing options...
neversaydie Posted March 25, 2012 Share Posted March 25, 2012 can anybody please explain ref these clearances ...these are the size of the gap..right?? what makes me scratch my head is why is there 2 settings ... or is it the actual tollerance if so for example the intake at 0.08mm-0.12mm to me thats 2 different settings...would it be correct to set it at 0.10mm which is bang inbetween ?????? 0.1mm = 4 thousands of an inch differnce between 0.08mm an 0.12mm is 0.04mm, which is less than 2 thousands of an inch If you can get a 0.10mm shim to pull out from between the adjusting screw and the valve stem with just a little drag then youve got it right, the same will do for both inlet and exhaust. Link to comment Share on other sites More sharing options...
Recommended Posts