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Tip height over the spring seat is 39mm intake, 39.3mm exhaust on my used stock head. These are stock parts, the post above and this one, using my Carpenter head for dimensions was a bad canvas, pretty much everything is altered from stock.

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Tip height over the spring seat is 39mm intake, 39.3mm exhaust on my used stock head. These are stock parts, the post above and this one, using my Carpenter head for dimensions was a bad canvas, pretty much everything is altered from stock.
That shouldn't be a big surprise. Surely you didn't think he was getting double the hp from waving a magic wand, and chanting some cute rhyming words. :p
 
That shouldn't be a big surprise. Surely you didn't think he was getting double the hp from waving a magic wand, and chanting some cute rhyming words. :p

Not at all, just didn't want any confusion over differing part dimensions between what I'd measured on Mufasa's head vs the stocker.

Bob came up with a lightweight solution that suits his design goal exceedingly well, unless you've the harmonics that eats the retainers on your bike. Even then, for a race bike, 5,000 mile service intervals is not bad at all, it's more than a couple seasons of racing.
 
Not at all, just didn't want any confusion over differing part dimensions between what I'd measured on Mufasa's head vs the stocker.

Bob came up with a lightweight solution that suits his design goal exceedingly well, unless you've the harmonics that eats the retainers on your bike. Even then, for a race bike, 5,000 mile service intervals is not bad at all, it's more than a couple seasons of racing.
Yes, you'd probably be checking spring rates after every couple races unless you found a problem.
 
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