A few weeks ago, I purchased an aftermarket rear spring from Trinity Racing. They sent me the wrong spring. They sent one for a Kasea, which happens to be a stiffer and slightly longer spring than the one best suited for the Lt80. I guess this is due to they didnt have the right one in stock and sent whatever they had? I really appreciate the info after its installed, if you know what I mean. Anyway, they say its going to be a few more weeks before they get the proper ones in. So, my question is, does anyone have the proper spring available for sale? I believe it should be the yellow spring. With the wrong spring installed, it still works fine, but it has lost tons on the top end, just like the belt is not getting to the bottom of the pulley, where it needs to run. To compensate for now, I regeared much taller, so my son can at least get 30 -35 back out of it. Can anyone help with this?


Thanks,

DStroyer

 

Sure,,I can help!
I need info tho,,,
What have you done to your motor (porting)?
Do you have all 6 rollers in the front clutch?
This could be the correct spring,,UNLESS they actually said that it's the wrong one.
Do you know the pound spring you recieved? (ie: 75# 80# 90#)
I have these springs.

 

LT80 Could you email me? I would like to talk to you about modifying the clutch on my sons. We have talked before but I cant find your email address.
Thanks
Noah

 

Hey Lt80,

Here is what I have, It is a trinity stage 3 porting, Im running 180 psi compression. Its bored .060 over. I have a modified reed cage with boyseen reeds. Im now using the stock carb with a 97.5 main, I had the 20mm kehin, but found it to be a pain in the A$$. I have 4 rollers in the front which I had drilled out 1/64 on the I.D. to lighten them. Im running 14 - 25 gears with a 428 non oring chain. . I think this is pretty good gearing, but I know its not topping out. They did say this spring was for a kasea machine, not an Lt80. But they thought it would work. The spring color is red, but I think the Lt is supposed to be yellow. Stock is blue. If you have the correct one, I would be happy to buy it, or if you think this is the correct one, I would be happy to send the assembly out to you and pay for your service. Thanks for your help.

Gary

 

OK, Thanks for the info. Lets see if this one will work, I think it may [img]i/expressions/face-icon-small-smile.gif[/img]
I would recommend adding roller weight. This will bring the sliding face closer to the fixed face and get you back the top end that was lost. I would start with 5 stock rollers (50 grams) and see what it does.If it looses too much bottom end then we know 50 gr. is too much.Still got bottom and no top, then it needs even more weight.My gut feeling is that you will need around 48 grams.
FYI: 6 rollers drilled out with 3/8 drill bit is 42 grams~~~6 rollers drilled out with letter "R" drill bit is approx 48 grams.
Some ppl think that running 5 rollers is not good (balance),for testing,dont worry one bit about it.Once the desired weight is found,,I do like drilling 6 to that weight,unless the weight is below 40 grams,then I use 4 rollers.
Basically:: the rear spring determines the roller weight.
I do feel that the same expierementation would have to be done whether that spring or mine(to dial it in).
I run them w/o the sidecover to see where the belt travels to. *hint* use a nuts/washers/rollers to space out the starter bolts,if you dont the starter will bang around during testing,it sounds terrible [img]i/expressions/face-icon-small-happy.gif[/img]

*notice* I double checked and it was a R sized bit not a Q.* [img]i/expressions/face-icon-small-blush.gif[/img]

 

Might help if I left email address! Here you go!
thanks