500 Two-Stroke Tech

Hi Guys

Thanks will be removing the harnass shortly to open it up. Will keep you posted. Just putting my 3ma1 together want to clear my work bench for harnass work.

Edd

I bought it off fleabay. Maybe previous owner taped wires up will open the harness and have a look.

Edd

Any idea if some harnasses came without a fan connector?

Edd

I will have a look at the wiring on the Tach thanks.
Edd

Hi Guys; Bike worked fine with the old wiring harnass I fitted a zeel on that harnass. Got a new harnass wanted to fit std cdi and pv controller back on the bike. Zeel is going to a track bike. Bike did work right with the old cdi and pv controller before I fitted the zeel. How many wires are sendin...

Hi Guys Fitted a new harnass on my rz 500 (43G). The new harnass does not have a plug to connect to the fan. Did some of the models not come out with fans? I also realised the 500 aluminium frame harnass is totally different to the one I had had to sell that again. I also have my neutral and oil lig...

Hi Guys

Ran the bike and it is loosing coolant so it confirms leaking head gasket. Will strip top of and see what is going on.

Edd

Hi' Thanks for the video will have to put the bike outside and have a careful look. Only used Yamaha parts on the rebuild. I will first remove the head to see what the piston and barrel is looking like before I will ride it again. My concern is your cylinder on the video is firing mine just goes dea...

Hi Guys; Cleaned check valves and tested them by blowing on them one was letting through more air than the others so cleaned all of them even ones from the spare pump and fitted pump with ones I believed had most resistance to letting air through. Started the bike and no4 was fine for about 60 secon...

Hi Guys; Thanks for clearing the check valves up for me. Stripped old pump yesterday was surprised as none was non return :grin: How do I know if they are still OK (trial and error?). Did the rag test yesterday attached photo shows the grey circles for No4 cylinder one on left after two minute of id...

Hi Guys; Thanks for all the inputs lots of oil out the back twostroke oil and fuel, plug is wet thats why I was thinking ignition poor spark I had fuel comming out so did floats again think that is solved now. The pressure was constant on all the cylinders 200 psi. The head gasket is new done about ...

Hi Gents;

Turns out the pressure gauge I borrowed was damaged. So bought my own all four cylinders are at 200 psi. Took her out for a spin no improvement it you can hear no4 is not running properly. Attached a video of the erratic idling.

http://youtu.be/MeJmcpUuAK8

Edd

Hi Guys; Just idling the bike and reving it will not clear the pipes I agree will take it out for a spin on the weekend to clear everyrhing out and get heat into the system. Initial psi tests were lower as I only kicked the engine over once. I was corrected and did it the way the guys on the forum s...

Hi Guys, I will do a video for you guys, but please be patient as I am a bit disadvantage when it comes to posting videos will need some help from my son. I did 10 proper kicks with the throttle open. I will redo it again tomorrow on all 4 cylinders to see bottom vs top. That pop is as if it fires e...

Hi Guys, So removed the carbs again split the two carbs and worked on problem carb only. Cleaned and checked all jets. Tested the float for leaks it was ok what I did realise was the little plate (don't know what to call it) on which the needle hooks was concave on shape and not straight. So replace...