No low end on 76 340 cyclone

fast823 · Post by **fast823** » Sat Jan 11, 2014 8:37 pm

I know they are not a power house but but real doggy on low end. Real good midrange and top end. Got new primary spring going to try but just thought I would get a list of things to look at.

JDT · Post by **JDT** » Sat Jan 11, 2014 8:42 pm

What is your idle speed?

What do your plugs look like?

fast823 · Post by **fast823** » Sat Jan 11, 2014 8:48 pm

Plugs look pretty good. Going to put some more miles on it to get a good plug reading.

Idle around 20. Starts and idles nice. Thinking clutching and not carb but looking for other ideas.

JDT · Post by **JDT** » Sat Jan 11, 2014 8:52 pm

I like to see a faster idle.

May be loading up a little and has the burn off some excess before she comes alive.

harleysportster · Post by **harleysportster** » Sat Jan 11, 2014 9:08 pm

Also, check to see if the proper clutch weights are on it.

fast823 · Post by **fast823** » Sat Jan 11, 2014 9:13 pm

Will turn up a little bit and check weights.

What is the right weights?

harleysportster · Post by **harleysportster** » Sat Jan 11, 2014 9:38 pm

fast823 wrote:Will turn up a little bit and check weights.

What is the right weights?

" F " weights

Danzig · Post by **Danzig** » Sun Jan 12, 2014 7:59 am

check to see where your belt is riding in the secondary clutch, if its below the secondary sheeves it is like statrting out in 3rd gear and you have a 5 speed. You want the belt about 1/8 inch above the secondary sheeves.

fast823 · Post by **fast823** » Sun Jan 12, 2014 10:45 am

Good call. Now that you say that it may be a little low. I will have dig into how to adjust. Have not messed with older clutches for a while.

harleysportster · Post by **harleysportster** » Sun Jan 12, 2014 11:39 am

fast823 wrote:Good call. Now that you say that it may be a little low. I will have dig into how to adjust. Have not messed with older clutches for a while.

You don't adjust, it's time for a replacement. A new belt is considered 1-1/4 inch wide. When it wears down to 1-1/8 inch, it's time for replacement.

Danzig · Post by **Danzig** » Sun Jan 12, 2014 1:20 pm

You dont adjust, however they are adjustable. Lets be correct, you shouldnt have to adjust.

harleysportster · Post by **harleysportster** » Sun Jan 12, 2014 1:58 pm

To better clarify, A new belt will ride up out of the secondary sheave as Danzig stated earlier. As the belt wears, it drops down below the outer edge and requires more engine torque to spin the secondary. The belt distance is adjustable also but this is an adjustment performed with JD alignment tool or suitable substitute.

fast823 · Post by **fast823** » Thu Jan 16, 2014 3:05 pm

Belt riding slightly lower. Putting new spring in clutch tonight to try. Also cleaned clutch as it was real dirty and binding a little. Going to turn up idle a little also. Running 370 main jet and has "F" weights in.

fast823 · Post by **fast823** » Thu Jan 16, 2014 11:00 pm

A lot better low end. Just a small stumble on mid range. Blowing and cold out so did not do to much more tuning. Running BR9ES plugs and will check them when I can get some more miles on.

No low end on 76 340 cyclone

No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone

Re: No low end on 76 340 cyclone