2018 Sidewinder grenades belt 15km into 270 tune

[yamahahaapex]

I picked up the Hurricane 270 tune with CAI and the Dalton Adjustable weights with 80g set up. Blew a belt at about 80kmh today just as I went to hop on throttle during the backshift. Upon inspection, the primary sheave 1.5" from the top to the centre of the sheave is completely black. I started the year off having the clutches cleaned so to me it seems like Im getting belt slippage at higher speeds and when the belt went off, it blew into parts where Ive seen threads in the past.

15.5mm rollers(new), orange dalton spring, purple, purple-green-purple primary for lower engagement which I think I'll be going back to stock there as this might be an issue. Dalton weights, 80g and secondary wrapped at 6-1 with an 8JP belt. Offset prior to running bone stock up to 1600kms was 59.9mm and was ridden quite hard with no issues. Today, after the belt blew I jumped up to 61.4mm so I know I have two roads to take to get the offset at least into the 58-59 range which sounds like the sweet spot from what I read.

Any ideas where to turn on the belt slipping? The secondary sheaves were not black although there was the same black film from the belt on top of the sheave Im thinking most likely when the belt took off.

I cleaned, vaccumed and blew out the shrapnel for the next ride but until then if you could share some of your experience in dealing with a slipping belt. My thoughts are the its easy to see why it blew which was a direct result of that but Im thinking somewhere along the line its either the additional weight in the primary due to more HP, different primary/secondary spring or the rollers and the sled has been great until this recent change.

Is everyone keeping their primary springs stock when running the 270 with Dalton weights?

Thanks in advance.

 

[fatchance]

That extra power will expose your clutching issues in a hurry. How many miles were on the belt?

 

[Crossfire12]

Sounds like you threw together your own clutch kit and got bit, wow
More weight in primary heavier spring secondary.
Play and pay for your research or buy known clutch kit from we’re you got your tune , or others

 

[STAIN]

Is it a stock muffler tune or a trail muffler tune? Stock helix?
I dont think you are that far off. Correct your offset, Change to a Timken belt, wrap that Dalton black/orange to 6-3 and I actually went with a 14.5mm roller. Stock straight 35 degree helix. I also ran the Dalton black/bronze primary spring. With 80 gram weights, I had pretty good luck before I went to the TAPP clutch

 

[TPAY243]

Crossfire is right call Dave at Hurricane and be done with it. You should have asked him when you bought your tune what he recommend you do with your clutching. It's either that or spend a bunch of money trying to figure it out your self, which is half the fun off it I guess.

 

[STAIN]

It's either that or spend a bunch of money trying to figure it out your self, which is half the fun off it I guess.

For me, it IS half the fun!!! I love tuning and trying different set ups, trying to perfect the way it runs and rides.
I understand those who want to install and go though, riding season is pretty short.

 

[Crossfire12]

And parts are expensive, but get a good starting point, and it will cost $500 less.

 

[1nc 2000]

Make sure your not getting snow on your clutches.

 

[yamahahaapex]

That extra power will expose your clutching issues in a hurry. How many miles were on the belt?

1000 miles

 

[yamahahaapex]

Is it a stock muffler tune or a trail muffler tune? Stock helix?
I dont think you are that far off. Correct your offset, Change to a Timken belt, wrap that Dalton black/orange to 6-3 and I actually went with a 14.5mm roller. Stock straight 35 degree helix. I also ran the Dalton black/bronze primary spring. With 80 gram weights, I had pretty good luck before I went to the TAPP clutch

Stock helix. Combo tune from hurricane with daltons set to 80g. Offset has just been corrected to 58.5. Thinking I might go back down to stock rollers in primary and throw a new set in

 

[yamahahaapex]

Crossfire is right call Dave at Hurricane and be done with it. You should have asked him when you bought your tune what he recommend you do with your clutching. It's either that or spend a bunch of money trying to figure it out your self, which is half the fun off it I guess.

Combo tune I got from Dave was already set up including the daltons. Where the issues are coming from are either the larger diameter rollers i put in or the orange dalton secondary which I’m thinking the next place to turn. Or the fact the original offset of 59.98mm might have exposed that issue with more power.

Dave has been great and I’m sure if I go back to original size rollers from here now that the offset it corrected to 58.5 we might be getting closer to some success

 

[fatchance]

You were due for a new belt and when you hammer on during a backshift with the 270 tune at 50mph it's not very alarming. These things are pretty forgiving really allowing you to try a wide spectrum of clutch components. Your offset played a bigger role in this than anything else. Kinda surprising the belt went that long stock. At 80g in the primary you shouldn't have been slipping on that side. It's more likely the belt was on it's way out for miles marking up the sheaves and the romp on the throttle finished it off.

 

[snowbeast]

1000 miles

What belt? 1000 miles is not bad,in respect to that kind of power,yes 2000 miles is better,but if you run very hard 95% of the time and can still get 1000 miles out of it,before it grenades good to go!Sorry i missed your first post,as it stated 8jp belt,i am always careful whenever i run the stock 8jp belt,and you already had 1000 on it,that would of had me being extra careful until i changed it out. I try not to run 8jp belts unless i have to,all Timkin for me now.

 

[yamahahaapex]

Took it for a 20k run. Little nervous as I don’t have a spare belt. Businesses are closed. Made it to the same destination and quite a few time I romped on it at 50mph and held for a few seconds. On and off throttle since it’s a new belt with about 20 gentle miles on it and I also threw the 14.5mm stock rollers back in.

On both primary and secondary. The outer sheaves are luke warm. Big difference. Inside sheave(closer to motor is warmer than the outside. Clutch sheaves are not grey and do show where the belt was going but not completely black. Just a darker shade than the grey sheave itself. I can see the belt is about a CM away from the top of the primary sheave which I think is close.

Thing is too I’m using the same belt I limped it home on the dirty sheaves so it will make a great spare come Monday.

primary spring is a 40/105 with dalton orange. I’m convinced the extra HP accentuated my 59.98mm offset and it looks like it jumped right out and was noticbly hot driving around the yard. I’m down to 58.5mm now

 

[yamahahaapex]

setup seems to be working well with 58.5mm offset and an XTX5058 belt. Clutches are warm, not hot and best of all, CLEANER. Had to shim belt a bit though compared to 8JP. 2mm washer on top of the two razor thin washer shims