Yamaha, there is a possibility of someone getting hurt with these SW primaries!

[KnappAttack]

I have dyno sheets here that show peak power at 9000-9100 & 9200 using 3" mufflers on Hurricanes 270 and 300 tunes. I know Hurricane likes them lower, but that's not what the dyno sheets I have are showing. I like the RPM up there that high on my sled vs. 8800 or even 8900.

 

[Crossfire12]

View attachment 158528 View attachment 158528
heres what I have!

 

[KnappAttack]

 

[Stubbs]

Here’s a sort of but not really related question for TP and any of you other guys who’ve run both the old 1049 three holer and the new 998.........these triples have always had vibes and been harder on clutch pieces than the four banger ever was, grooved flyweights with some miles on them is a fact of life from what I’ve seen with the sleds I service. Has anyone noticed less flyweight grooving using larger rollers vs. smaller rollers? Can you run the flyweights for more miles before the grooves show up with one size roller vs. another? I know this is a little off topic here, but it’s been on my mind lately after grooving up a set of new (and expensive) weights fairly quickly. Most of the guys I’d PM for insight have already responded to this thread. Sorry to get a little off track here.

 

[cannondale27]

Here’s a sort of but not really related question for TP and any of you other guys who’ve run both the old 1049 three holer and the new 998.........these triples have always had vibes and been harder on clutch pieces than the four banger ever was, grooved flyweights with some miles on them is a fact of life from what I’ve seen with the sleds I service. Has anyone noticed less flyweight grooving using larger rollers vs. smaller rollers? Can you run the flyweights for more miles before the grooves show up with one size roller vs. another? I know this is a little off topic here, but it’s been on my mind lately after grooving up a set of new (and expensive) weights fairly quickly. Most of the guys I’d PM for insight have already responded to this thread. Sorry to get a little off track here.

Would make sense. I havent seen any grooving with the weights I am using and not willing to lose the launch the smaller rollers give vs the big. For me its very noticeable difference.

 

[swampcat]

I apoligize as well for dragging this clutch thread into a rpm power band rabbit hole

 

[swampcat]

Quite the difference of rpm at max torque in those 2 dyno sheets. 2000 rpm apart, never would have guessed.

 

[jonlafon1]

Here’s a sort of but not really related question for TP and any of you other guys who’ve run both the old 1049 three holer and the new 998.........these triples have always had vibes and been harder on clutch pieces than the four banger ever was, grooved flyweights with some miles on them is a fact of life from what I’ve seen with the sleds I service. Has anyone noticed less flyweight grooving using larger rollers vs. smaller rollers? Can you run the flyweights for more miles before the grooves show up with one size roller vs. another? I know this is a little off topic here, but it’s been on my mind lately after grooving up a set of new (and expensive) weights fairly quickly. Most of the guys I’d PM for insight have already responded to this thread. Sorry to get a little off track here.

Funny you mention this! I noticed my aftermarket weights have a slight groove in them.. Not terrible but I noticed this upon inspection. 10K on the weights.
Any way to fix this? Thinking sanding all three at the same time?

 

[Stubbs]

Funny you mention this! I noticed my aftermarket weights have a slight groove in them.. Not terrible but I noticed this upon inspection. 10K on the weights.
Any way to fix this? Thinking sanding all three at the same time?

What size rollers are you running? Which aftermarket weights do you use? Is that 10k miles? I’ve put just over 4000 km on my weights last season and they have a very slight groove. If you catch them early I’ve had luck refacing the weights with some emery cloth, but I’m not super happy about it. Stock weights seem to run longer before grooving.

 

[KnappAttack]

Funny you mention this! I noticed my aftermarket weights have a slight groove in them.. Not terrible but I noticed this upon inspection. 10K on the weights.
Any way to fix this? Thinking sanding all three at the same time?

I'd throw them away. Once grooved they are done. Yes you could sand them, but the profile will change.

I have no wear on my Daltons, but I know there are weights out there that are not very hard and prone to wear, especially on the 998 or the three cylinder Yamahas.

 

[STAIN]

I want to see pictures of the cracked secondary’s

 

[Stubbs]

I'd throw them away. Once grooved they are done. Yes you could sand them, but the profile will change.

I have no wear on my Daltons, but I know there are weights out there that are not very hard and prone to wear, especially on the 998 or the three cylinder Yamahas.

My weights are Daltons, slightly grooved with only about 4000 km on them. This is on a 1049 with Hurricane/Hindle package, spinning 9000 RPM +, 14.5mm rollers.

 

[jonlafon1]

What size rollers are you running? Which aftermarket weights do you use? Is that 10k miles? I’ve put just over 4000 km on my weights last season and they have a very slight groove. If you catch them early I’ve had luck refacing the weights with some emery cloth, but I’m not super happy about it. Stock weights seem to run longer before grooving.

Stock sized rollers. Thunder weights.. 10 thousand miles

 

[KnappAttack]

Typically groves in the arms and sheave faces come from riding in one range too long and most of the time. Say you ride at a consistent speed like say 60 MPH for miles on end.

 

[Stubbs]

Typically groves in the arms and sheave faces come from riding in one range too long and most of the time. Say you ride at a consistent speed like say 60 MPH for miles on end.

Agreed. I rode mostly Northern Ontario last winter, sustained RPM for long periods of time. That’s still shitty life span for an expensive set of weights, and wondering if switching to 15.6mm rollers will give me better longevity?