4-speed power limitations?

[xlfan]

How much power can a 86-90 4-speed transmission take?
Is there 10 sec 4-speeds out there?

[jsachs1]

How much power can a 86-90 4-speed transmission take?
Is there 10 sec 4-speeds out there?

My 86' Sportster has run in the 10.00 second range with the stock 4-speed trans. The weak, frustrating, issue, is the clutch. It doesn't last too long.
John

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[Mattls6]

A lot of these guys local to me are running 4-speeds. The track is shorter than 1/8" mile but they'd be running 10s if geared and ran in the 1/4 mile. I forget what fuel they're running but I'm figuring they're around 100hp or so.


jsachs1 - I'm trying to get my hands on those pro streets for my street/strip Sportster. Did you run them wide open?

[jsachs1]

The person that bought my Sportster in 97', made some changes. Pro Streets, and had me build him a set of wheelie bars. I know the bike is currently for sale.
John