1981 srx

[Loosenuts]

Hey guys!!
I am restoring my 81 SRX and am going to switch to slide carbs. I have a nice set of 38 Mikunis.
Question 1 is ....will 38's be big enough?
Question 2 is.....what is a good starting point for jetting.

Thanks

 

[YAMMIEGOD3:16]

yes they are fine to use and as farr as jetting, where ya at right now ? mains, pilots, brass, etc 3:16x (yammie tony)

 

[Loosenuts]

Thanks for the reply Tony
330 mains
40 Pilots
Q0 needle Jets
6DH7 Needles.......middle groove
Air screws 1 turn out
2.0 slides

I have not "pulled the rope" yet......just want to make sure i am in the ballpark.
I figured someone on here has to be running these carbs on an 81.

Tim

 

[YAMMIEGOD3:16]

up that main jet to 380. everything else looks pretty good. i used butterflies on my 81, but ran 39.5 carbs on alot of older srx,s. 3:16x (yammie tony)

 

[Loosenuts]

Thanks again !! I will up the mains and fire it up.

 

[northern srx]

Keep us posted with pics!

 

[Loosenuts]

Will do !!

 

[Yamaha Nutz]

like Tony said up the mains .....it is a good starting point but for me i would change up the tubes,needles and slides......i would go with a Q-8 tube 2.5 slide and 6DH3 needle in 3RD groove

 

[Loosenuts]

All good info guys !! I thought i had seen a chart somewhere that showed what needles were compatible with what needle jets (tubes) Am I crazy....or is there such a thing?

 

[unchained]

I'm restoring an original owner 900 mile 81 SRX myself but plan on retaining the stock butterflys. I know they have a deadly lean spot in the 1/3 throttle range but pondering a dial-a-jet set up to compensate...

 

[Loosenuts]

I thought about using the stock carbs too...but I was thinking the slides had a little better adjustability.

 

[unchained]

Yep. I'm sure there are more proven carb set ups for 38 slides but hope to get the butterflies dialed in but may throw the towel in at some point...

 

[Loosenuts]

I have 2.0 and 3.0 slides what would be better of them two. Or should I search for some 2.5's

 

[Loosenuts]

Anyone familiar with these weights?

 

[northern srx]

Now that's a "notch"!

 

[YAMMIEGOD3:16]

your engagement will be 7200. 3:16x (yammie tony)

 

[Loosenuts]

LOL !! Hang on

 

[vmax-540]

They are High elevation weights for the 81 SRX.

 

[YAMMIEGOD3:16]

that would work great for ice drags if your chaincase don,t blow apart. very aggressive weight. 3:16 (yammie tony)