elsinore250

I thought I had already burnt the pipe out on this bike, maybe not... I will take another look when I get a minute. Thanks for the help.

The coil with the copper wire wrapped around it has a couple of spots on it that kind of look like dried glue. The largest is about 10mm long and 1mm wide.

Thanks fellas. I checked and cleaned all of the electrical connections yesterday (I am crap with electrics, I have testing gear but don't know how to use it). leaning all of the connections made no difference to how the bike ran. That's when I noticed the crank seal was off center. My seal is now pushed in 5mm. I only ran it up and down the street once after I tried to push it back inline. It definitely sounds like it is sucking air or rubbing against something. My plug is black in color (not wet or sooty). When I think about it I have had this problem for quite a while now (it never reverts back to running ok). I couldn't really notice a difference after I tried the WD40 test.

It sounds like it is sucking air in from the mag side crank seal. A new seal was fitted soon after I found the bike. The seal looked like it had slipped off center so I tried to push it back in line and the problem got worse! Their is no lip for the seal to rest against on my case. I have just ordered a new seal, how far should I push it in? I am also going to pull the carb rubber and re-install it with a little silicone.

LOL! Thanks

So all the stuff about "reed flutter" is nonsense?

Not checked to see if the exhaust has a restrictor tube in there. Going to have a look this weekend. If I find one do I have to cut and re-weld the pipe to remove it? On another note... My friend who tinkers with RD's says the Boyesen reeds I installed maybe causing the problem. He mentioned my bike could be suffering from fiber "reed flutter". Does this make any sense? Should I try putting the stock Yam reeds back in there? Any help would be sincerely appreciated. Thanks, Paul

Thanks for all the comments. I am about to check the whole electrical system.

I am having an intermittent problem with my 175 MX. It will not run smoothly above 1500 RPM right up to 5000 RPM. Once it reaches 5000 RPM everything is fine. It will also not idle. It sounds like it is suffering from fuel starvation. It might do this for 20 or 30 miles and then it will revert back to running absolutely fine. The carb has been completely stripped and cleaned around half a dozen times (including the tiny hole in the float bowl) . The CDI side crankshaft oil seal has been replaced and I have tried a couple of new plugs. The little oil ring around the nozzle/main jet is worn. Could this be the problem or could it be something to do with the electrics? Any help or advice would be greatly appreciated. Thanks,

Airhead, thanks for all your advice. I actually spotted the chain filter wrench in a couple of your other posts. I went out and bought one this morning. Rotor is back on and correctly torqued @ 39.5 ft/lbs and I have a lovely fat blue spark. Would you stick an 8 or 9 plug in it? The Bike will be used for short low speed 10 mile round trips and the odd light trail ride. Can't believe how many NOS bits are available and how cheap they are. I have removed, cleaned and greased/oiled just about every moving part on the this little bike. Absolutely loving it! Going to collect the fuel tank Friday afternoon (my pal has cleaned and sealed it). Looking forward to firing it up. Will let you know how it goes. Thanks again for all your help so far. Paul

Correct Airhead. The counter sink scews just tighten up. No option to move the backing plate. Do I have to position the piston before I tighten the screws or won't that make any difference?

Got the bike sparking, freed up the carb. Had to remove the flywheel to replace the crank seal. Timing is not my strong point. Just ordered the tool on the following link. Will it enable me to correctly time my bike or do I need a timing light? Please see the attched link showing the marking on my flywheel and case before I pulled it. Can somebody please explain exactly what I need to do. Sorry for sounding like a muppet, like I said timing is not my strong point! Ta very much for any help offered. http://www.flickr.com/photos/elsinore250/10444173093/ http://www.flickr.com/photos/elsinore250/10444128476/

Airhead, thanks for all the electrical info. I will let you know how I go on after I get into it.

Thanks blackhat250. You got it on the Honda thing, love 79 & 80 Red Rockets. I will give the hot water idea a try. Thanks for recommending battery type. Is the auto lube system likely to need a lot doing to it?

Should I buy a Yuasa battery or??

Thanks for the diesel fuel tip. Carb cleaner didn't do anything to help. I first noticed the oil when I pulled the plug and kicked it over to check for a spark. I was thinking maybe the oil would have helped preserve the seals. I have got away with it with many of the other vintage bikes I have messed with. Do you guys think I am going to have to switch out the clutch side crank seal? Thanks again

Airhead, thanks for getting back to me. Bike was actually manufactured in 6/79. I believe that makes it an F model. Electrics are not my strong point (especially anything with lights). Same thing goes for oil injection. Do you think the 2 stroke oil has seeped through bad crank case seals? I have never really done much messing with road/trail bikes only vintage/evo MX and Trials bikes. Very excited to get started on the DT. I am actually going to use it to knock around on weekends and evenings. Thanks again, Paul

Here are a couple of pics of the bike as I found it. http://www.flickr.com/photos/24167983@N04/10046410224/lightbox/ http://www.flickr.com/photos/elsinore250/10046395224/lightbox/ http://www.flickr.com/photos/elsinore250/10046529013/lightbox/ http://www.flickr.com/photos/elsinore250/10046514683/lightbox/ http://www.flickr.com/photos/elsinore250/10046618533/lightbox/ http://www.flickr.com/photos/elsinore250/10046617243/lightbox/

Hi there, I am brand new to this forum and could really use you fellas help. After wanting a DT 175 MX since I was an 11 year old boy growing up in Leeds, England (my 18 year old neighbor had one back in 1979). I finally found one a few miles up the road from where I now live in Atlanta, USA. Bike is not sparking from plug cap or ht lead. I pulled the ignition cover only to find the flywheel compartment one third full of two stroke oil. Is this usually the case with a DT that's been sat for 30 years? Bike had been stored in a covered shed. It was very dusty from storage. It does have some surface rust that wipes off easily with fine wire wool. Looks like the carb is also toast as the slide was so gunked up with old fuel it is stuck in the carb body. One more thing.... Can anybody recommend a good battery for this bike? Any help or advice would be sincerely appreciated. Cheers, Paul