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BSR engines are built, one at a time, for each customer's specific needs. Unless requested, our engines are built to wka rules for the stock classes. Each engine has all the wka legal machine work done and is tuned on our inertia dyno to achieve maximum performance for your weight class and track conditions. Your expectations are high and so are ours. The engine will be shipped only after it has met our expectations. When your new engine arrives, just add fuel and oil. Now, go win yourself a race!
This is what you get with a BSR stock class engine:
* align bored
* rewind starter
* high flow head
* cam for your class
* high flow carb
* high flow ports
* chain guard
* throttle kit
* billet lifters
* fuel tank brace
* lifter bore welded
* carb brace
* header & muffler for your class
* header brace
* racing plug
* steel bore raptor
* air filter
* air filter adapter
* wka legal machine work
Options
billet rod (recommended if allowed by your track) $50.00 ![]()
dual bearing block $150.00 ![]()
loop header $60.00 ![]()
Stock appearing and a local rules engine are available. Contact us for a price quote on these engines.
[WKA Limited Modified] $1600.00


