270 race tune findings

[Doowithblue]

So for those of you who have 58 gram base and are wondering how to get to upper 70s and we'll into the 80s for weight there are 7/16 brass and 1/2 brass thick bolts as well as the aforementioned tungsten washers. Is a 63g base weight the better option? Imo yes but the tuning options are still available for those running big tunes using the 58g base. Also keep in mind that the hh's will not require as much overall weight vs the flatter profiled flyweights. Choose your weapon and tune the back end to match the front whether it's a slower shifting flatter profile or the quickest shifting hh's.

 

[**sj**]

I've got 63s and kind wish I had gotten 58s

Are they the same with the extra weight spread evenly?

 

[ClutchMaster]

I've got 63s and kind wish I had gotten 58s

Are they the same with the extra weight spread evenly?

I know right! These are very very aggressive weights! Yes it’s pretty even they are wider throughout the profile. Kinda wish I still had a set!

 

[Stubbs]

How does the HH profile match up with an STM 60Y? I know the new 60YS weights have a flatter profile.

 

[fatchance]

SJ, I believe the ramp is more narrow on the 58's so the heel has the same mass as the rest of them.

 

[ClutchMaster]

How does the HH profile match up with an STM 60Y? I know the new 60YS weights have a flatter profile.

Definitely more aggressive than the 60Y. I would say the most aggressive weights on the market.

 

[Jafo1970]

So for those of you who have 58 gram base and are wondering how to get to upper 70s and we'll into the 80s for weight there are 7/16 brass and 1/2 brass thick bolts as well as the aforementioned tungsten washers. Is a 63g base weight the better option? Imo yes but the tuning options are still available for those running big tunes using the 58g base. Also keep in mind that the hh's will not require as much overall weight vs the flatter profiled flyweights. Choose your weapon and tune the back end to match the front whether it's a slower shifting flatter profile or the quickest shifting hh's.

This isn't really true unless you want to machine the inside of your clutch. I had the 58 base and couldn't get enough weight yet for the 290r flash. I had the 7gram big boy brass 7/16th in the tip with tungsten washers in the middle with the heaviest 7/16th bolt and it wasn't 80 grams yet. This is the most combination you can go. If you try running the 1/2" big boy brass of 9 grams then you loose the flexibility of the other hole and can only run a 3/8" bolt. Plus your limited on how many washers you can go with it hitting the inside of the clutch when there tucked and push against the roller. You can't run any washer's under the big boy brass bolts. Plus Lonn said the tungsten washers are limited since they cost so much for a minimum buy. I went with 63 gram base and am at 80 grams now and need to add a little more yet as I'm revving to 9100ish. The 63 grams are a little wider and distribute the extra 5 grams over the 58 throughout the part of the arm that runs the roller.

 

[Doowithblue]

Ya not sure about yours but I'm running 7/16 with a washer in middle and 1/2" tip with zero issues. No issues screwing them in and no clearance issues. But im only running 270 tune which was the purpose of this thread.

 

[ClutchMaster]

This isn't really true unless you want to machine the inside of your clutch. I had the 58 base and couldn't get enough weight yet for the 290r flash. I had the 7gram big boy brass 7/16th in the tip with tungsten washers in the middle with the heaviest 7/16th bolt and it wasn't 80 grams yet. This is the most combination you can go. If you try running the 1/2" big boy brass of 9 grams then you loose the flexibility of the other hole and can only run a 3/8" bolt. Plus your limited on how many washers you can go with it hitting the inside of the clutch when there tucked and push against the roller. You can't run any washer's under the big boy brass bolts. Plus Lonn said the tungsten washers are limited since they cost so much for a minimum buy. I went with 63 gram base and am at 80 grams now and need to add a little more yet as I'm revving to 9100ish. The 63 grams are a little wider and distribute the extra 5 grams over the 58 throughout the part of the arm that runs the roller.

Jafo, what’s your secondary setup? Seems heavy for hitters, but then again you at huge power also.

 

[Jafo1970]

Ya not sure about yours but I'm running 7/16 with a washer in middle and 1/2" tip with zero issues. No issues screwing them in and no clearance issues. But im only running 270 tune which was the purpose of this thread.

I was told by Lonn that 1/2" bolt wouldn't fit with 7/16" so I didn't try it. Did you clock the 1/2" so flat side is facing the 7/16" before installing the middle. Is that how it worked? I know the big boy brass was just touching the inside of the clutch when tucked in on the tip.

 

[Jafo1970]

Jafo, what’s your secondary setup? Seems heavy for hitters, but then again you at huge power also.

Dalton blk/orange spring with 41/37 helix and 8dn belt.

I do have some 58base HH for sale with hardware in box. 1000 miles on them. $150 plus S/H.

 

[ClutchMaster]

Dalton blk/orange spring with 41/37 helix and 8dn belt.

I do have some 58base HH for sale with hardware in box. 1000 miles on them. $150 plus S/H.

Ok sounds good, maybe a straight 40 would help? Probably slip some with 8dn tho?
Bust out the welder!

 

[ClutchMaster]

Definitely more aggressive than the 60Y. I would say the most aggressive weights on the market.

Heel Clickers are about the same as the HH’s

 

[Yam4Strokin]

How does the HH profile match up with an STM 60Y? I know the new 60YS weights have a flatter profile.

60Y & Heavy Hitter use the exact same profile. It's a Polaris 10- series weight profile, a Heel Clicker also uses that profile. Ulmer had the YS series profile made by STM, it is a replica of the OEM Yamaha 8ES profile.

 

[ROCKERDAN]

Definitely more aggressive than the 60Y. I would say the most aggressive weights on the market.