When I had the oil pump rebuilt part of the service was to adjust the oil delivery if required , never bothered as bike standard albeit with a forged piston.

Chains doesnt stretch, they wear. I have 28.000km on a 520 Did vx2 chain on my xt600... Imagine the reliability on a Dt

@calum okidoki

@declan Cheers man!

Top up the coolant and let the bike idle with cap off. Be patient, after a couple of minutes it will start to bubble. Then, a couple of minutes later, rev it slightly and watch more bubbles escape. I did this for a good 20 minutes. Note that there will be bubbles left, but once you get most out there should be no cooling problem.

@declan looks like I'll be doing a top end rebuild at some point After Christmas

@sgt-robuck-5 you don’t see too many of that era of dt I don’t know if there rare I’m just speaking from experience in looking to buy although you will find them usually it’s an older Model that you will come across

Sounds like you've covered the fueling system, which means it's going to be an electrical component. You will want to buy a new spark plug, HT Lead and iginition coil to rule out those items. Next will be the pickup, if that starts to deteriorate then it will start to missfire. Then unfortunately the CDI. But CDI's rarely fail, but I guess it is 30 years old.

Distinct blueing of the small eye or bearing. Lose needles or other wise damage. I think a new small end bearing is like £5 so it's no hardship to simply replace if in doubt

I turned the bike off for about 30 seconds, turned it back on and let it idle and it was fine, the light was on for a good 3-4 mins beforehand though. Wasn't low on power at all, felt like it was running fine. Sensor was replaced a few months back when the old one snapped.

Meh, I mean, I would just use it. But we were linked to a video of a guy with a TDR 250 who said the engine seized because of a worn bush. So.... use at risk. Renew if funds allow

@declan hell yeah

@cartermarc1 The valve will be flush with the exhaust port, since the valves job is to altr the exhaust port height to enable better low end performance by restricting lost fuel and air theough the open port.

@calum I've used this before in both my dt and yz and never had anything go wrong tho??

You normally check the squish by feeding a small length of solder down the spark plug hole, so the edge of the solder touches the edge of the bore. Then turning the engine over by hand then measuring the squashed end of the solder with a micrometer or similar. The squish on my dtr was 0.6mm when I bought it, which seems to be on the tight side.

It will go thousands and thousands of miles on the gearbox oil, no worries

You could fill oil tank, bleed pump and run bike on premix with oil discharge pipe disconnected into a milk bottle amd see if it works with engine running, rotate pulley on oil pump to max for maximum discharge. Will give you an idea if its doing anything at all.

@mitch_350z Right, yeah 10mm IIRC. I replaced all mine with M6 Stainless Steel Hex heads.

It's designed to be like that for the pick up.

@ninja tell me about it, I wish engines were see through