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Old 02-12-2018, 10:01 PM
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Default 03 340 primary spring?

Oem blue and white engaged to high for my 8 year old. Tried gold and silver and super boggy now and can’t even get it up on trailer. Any ideas which spring to try?
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Old 02-13-2018, 10:06 PM
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You could try the Polaris black #7043120 60/340, just watch the peak RPM as that spring will add approx 300RPM. 2gram heavier weights will bring the RPM back down if needed. I can't imagine your 8yr old is going to be running wide open much anyways so peak rpm probably doesn't matter for now.
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Old 02-14-2018, 07:56 AM
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Quote:
Originally Posted by RMK-King View Post
You could try the Polaris black #7043120 60/340, just watch the peak RPM as that spring will add approx 300RPM. 2gram heavier weights will bring the RPM back down if needed. I can't imagine your 8yr old is going to be running wide open much anyways so peak rpm probably doesn't matter for now.
went back to oem set up. Have my 8 year old get used to high engagement.
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Old 02-21-2018, 10:59 AM
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Huge difference in performance with the lighter weights and stiffer spring. I did notice though the manual calls for a 8 and not 9 plug. PO had 9's, I read a previous post that said changing the plug made a big difference in their sled. What do you guys think? I'm going to put 8's in regardless but I didn't have a chance to test it.
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