73 nitro 340

[73nitro340]

Here is my sled it is a good runner great to run around in fields with, it has the TR340-S motor with a hooker exhaust nice sound to it, yellow spring in the primary clutch, secondary spring set in the fourth hole (haven't checked the spring tension yet), running a 14 tooth driver and 28 tooth driven in the chaincase. The one thing I sometimes wonder about, it engages at about 6000 rpm and at top speed it is 7000+ rpm, and top speed is 51.5 mph which is gps speed. Any question or comments are welcome.

Thanks Aaron

[seacoastrupp]

You are running the wrong gear and primary clutch spring.
The yellow spring and 14 tooth top gear is 440
this is why you engage at such a high rpm then run flat running out of wind.
Replace and re-tune clutching w/ a lighter primary spring, Your fly weights may need to be lighter too...should start engaging around 3800-4200 rpm.. start there...
You might want to go with a 13 tooth top gear later, to improve more take off, low end snap.
I look at it this way,,, Gear= by the math= speed I would like to achieve....... Clutching= how to get the power to the gear efficiently.
Clutching is one of those things that appears to be very simple, but can run you around in circles... Start with a good belt, and alignment. Make note to shimming in primary as well.

[73nitro340]

Thanks for the info, this is how I left it since I bought it last year and just learning by following you guys on the forum. Another question is how fast can these sleds go at top speed when they are set right, I have the right weights in the primary according to the data sheet I have and another question how come don't I run out of power being this is set up for the 440 motor does the 440 run higher rpm. So if I set secondary spring into the 2nd hole according to my sheet does that mean the secondary will open sooner thus start speeding up sooner and than the rpms will take it faster at top speed. I am posting another pic that show the drive shaft twisted which I discovered couple weeks ago which I'm going to assume that this sled could had a bigger motor in it. I really like to see comments come in. Thanks again for your help.

Aaron

[73nitro340]

The pic which I forgot to add in the last post.