Messages

Thanks, this will be a big help. 

Thanks for the explanation on how to wire it that would have been my next question. 

Thanks, I use the provided linked eBay regulator instead of the trail tech regulator, as it has a smoother signal with less flickering. 

That works out good as Treat land is out of the Trail Tech regulators. 

Thanks again, for all the knowledge.

Brian

Hello again,

I am building another RD.  This one is an R5 motor converted to 6 speed in a 400 frame.  The bike is going to need to have lights as it will be street legal. 

Just running a headlight and taillight.  I am planning on doing what was mentioned in this post to run the lights by ungrounding the lighting coil.  Do i need anything else from Treatland.  I was  not planning on using a battery in the wiring on this bike. 

I was going to buy the following:

 
1. HPI CDI mini rotor ignition system for yamaha RD250, DS7, RD350, YR5, RD400, this version has an integrated 60W light coil for super bright lights!! great curve and comes with all you need to make the change. plus you can adjust your stator anytime even with the flywheel mounted!

2. trail tech dial-a-brightness AC voltage regulator


As always thanks for all the help from this forum.

Brian

Thanks

Just trying to confirm that high top carbs on a RD350 use the following spring: Yamaha part number 360-14131-00-00.  I checked Yamaha OEM Part list and the RD Parts catalogue on this site. They both have the same part number listed. Just want to make sure I am not missing something.   

Thanks for any help. 

Thanks

Thanks again for all the help.  I am going to drop mine down also.  Hopefully this bike will finally be squared away and I can start my next RD build: RD 400 frame, r5 motor with an RD 6 speed transmission.  Let the fun begin again.     

Thanks I may also drop the pilots down.  Are the 30's with pod filters?  Thanks

Update:
I dropped it to 200 mains. It seems better. Not breaking/loading up. What is everyone opinion with my 37.5 pilot. It still seams pretty rich on the bottom. What are the recommendations for the pilots with the Dave F carb mod for the pilots?

Thanks again!

Thanks for info.  I am going to lean it out some and try. I will update outcomes. 

Thanks I will try all the suggestions and let you know. 

They are us spec stock cylinders. 64.25  I believe, can't remember.  1st over. 

I am going to drop it to 200 and try. 

Fingers crossed! 

Thanks
Brian

 

I am still trying to figure out what I think is the jetting on my RD.  Sometimes it runs fine but this problem keeps re-appearing.  I initially thought it was fuel flow problem as the fuel lines do not fill once needle valve closes. (changed petcock and needles and seats) I also adjusted air screw and pilot.  I believe that the jetting is close. The bike is all rebuilt with new pistons and seals.   

I am trying to figure out which way I need to go on the jetting either leaner or richer on the main jet. (I am thinking richer) The bike breaks up and sounds like its starving for fuel high in the revs. The revs flatten off in 3rd gear.  (my opinion)  The revs pull through in 1st and 2nd.


1975 RD350
Stock VM carbs
Dave F carb mod with correct needles.
240 mains
37.5 pilots  Previously had 40's in it but the still had same problem.

Stock YZ 85 reeds
Banshee reed spacers
Uni pod foam filters oiled with foam air filter oil
expansion chambers
no porting

Thanks for any help or suggestions.

Brian

Thanks for info.

Does anyone know if a RD400/LC350 Fuel Petcock Reproduction 4L0-24500-00-00 from Economy Cycle will fit a 1975 RD350 gas tank?