1984 WR400 help

any of my 80s bikes that have that style are ebc 801g

thanks guys. going to make a few calls tomorrow to EBC and that vintage husky parts place, to verify/order.

anybody know where i can find replacement gas tank decals, headlight bulb, and speedo?

check your pipe and muffler for an obstruction and repack it. im out to a430 on the main jet but up 1 clip on the needle with 75 - 80 :1 motorex full synth. bikes runs sweet on an old top end. also look at your air filter for collapse.

the plug may be changed for an egv as they are better than an es. may be contributing to a loss of power but they usually start missing

get those radiator stickers copied....they are unobtanium....don't worry bout the tank decals as they will just peel off again if you ride it regularly, just stick a couple of "h" stickers in the tank. don't stress about the speedo if your riding it, it will only die again from vibes or a crash. if you get a good one, keep it in a box....

enjoy a great bike

thanks suprize!

Brake pads are ordered (ebc 801g, as confirmed by ebc, amazon 22 bucks!)
i am waiting on a paypal invoice for a bulb ($24, ouch!)

decals and speedo arent a must, but hoping to make my fathers old bike mint soon, but need to get it riding right first.

i didnt want to mess with jetting because its how he left it and i assume it ran right. i remember seeing him wheelie it when i was about 10 years old riding a pw50.

air filter is mint as i replaced it last year and rhode once. it was collapsed before that

next week i will have good brakes, take it for a test ride where i can open it up, and re-test the compression.

updates to come, thanks to all for the help!

+1 suprize

"check your pipe and muffler for an obstruction and repack it"

Especially the muffler. Found a mouse nest in mine once, it was blocked solid!

Almost certainly the spark arrester is carbon upped and creating too much back pressure.

Looks lIke I lied guys. Compression is 162ish. Timing is at 22 degrees. Advanced I assume? Is that too much and is my issue?

If not I guess the last thing left as said above is clogged muffler. When this is answered I'll change timing or pull muffler if I don't already. I had the pipe off a few years ago and it was clear.... for those rubber mounts which as I said before some are broken, but I don't think are my issue (leaking exhaust before pipe).

lol, 162 is more normal. like i said earlier, it will likely be around 180psi with a fresh ring.
im not sure about the 22 degrees as i time mine at the piston with a dial indicator but the service manual here has the spec for both readings at the piston and at the flywheel.
might as well pull the silencer and repack/inspect. a good packing is very smart for troubleshooting or jetting.

430 is 17 degrees or 2.2mm but should be easy to look up for your model set it to more retard for a bit more top end, looking at the engine and reed photos everything looks almost brand new.once you have ruled out the intake,engine condition,exhaust which i think you have then try ignition.
Would still recommend doing a leak down test just for peace of mind esp if your going to be revving it hard.

Thanks guys, think I found it as u all said. Muffler.

I belive the baffle is broken so wouldve been misaligned causing a huge obstruction. And I assume there should have been packing?

Pic

Looking to buy a muffler (and packing) asap. Also would love to get the headlight bulb numbers. Then I should be in business

Brake pads are in and working nicely on a stand

Surprise, did you mean you run 80:1 fuel?? I must be confused. I do 45:1

Stormer, as I believe I previously wrote, air filter is a few years old but brand new. Probably 10 miles on it

Opportunity to buy an AM muffler?

Pic

Would re pack and reuse the original the packing will hold thingd in place just clean any bunged up screen holes if you buy the am make sure it has a spark arrester.

Any 2 stroke packing? Like the fmf stuff on ebay?

Was hoping for a bit more detail... am I right that this was likely the issue? Where did my packing go? I would like to use a non broken baffle if possible....