Barn find, Briggs & Stratton Raptor 3 race engine.

This is a video of a Briggs & Stratton Raptor 3 race engine that was in a shed for 21 years, it was on a old hand built yard kart and the gas tank, carburetor and intake port had water in them, so the engine was completely disassembled, cleaned, inspected and measured. This is a model 135230, Kool bore engine. The following OEM Briggs & Stratton parts were installed: 298982 - Rings / 261044 - Intake valve / 692180 - valve springs / 692194 - Valve retainer / 555061 - Valve lifter / 791781 - Breather / 555050 - Bearing / 555210 - Gasket set.
The carburetor is a new predator carb with #.018 low speed jet and #.035 main jet and stock E-tube on a custom built intake, the exhaust is a long pipe two stage header.
The following are some measurements: Bore = 2.5625" / Piston = 2.5580" / crank journal = 0.998" / Rod journal = 0.999" / Rod pin = 0.4895" / exhaust valve stem = 0.247"

[@whitelightning2]

I remember buying one of these new in '97 or '98. I ran it for 1 summer then had to move. Sadly it was left in a garage in Phoenix and probably ended up in a yard sale or something. It ran great though, good memories.

[@jimhernandez5175]

we ran stock 5hp in the 70s the ran good as they are i had one on a dune cycle i think all it had was a long pipe no gov. it would run wide open never had a problem

[@minibikemadman]

I have a raptor 3 that was built by PRE and runs on methanol..its a wild motor in a mini bike.

[@BustedKnucklesBuildsTexas]

Nice engine

[@edwhitson9873]

I built and raced model 130232, and 130202 Briggs (stock lite, and stock appearing) late 80s early 90s had tons of fun. Margay chassis first then a bugg. I don't think any of the tracks are still operating now in this area

[@DS-ss7vl]

Try a PZ20 Mikuni style carb. You won't have to mess with any throttle linkage.

[@stevezevallos3735]

Is that a fuel pump system???? Please provide details and if you have a video on it, I would love to see it.

[@testerbois5993]

i have a raptor right now, a lot of the parts aren’t running on it and i want to fix it up so baddd

[@tmav6591]

awesome engine purchased minibike with briggs raptor engine on it painted green has carb with no air cleaner silver ring (on carb) and long crazy exhaust pipe? No tag or numbers on engine Do you know how to ID it? Thanks in advance,

[@colbychase635]

I have a raptor briggs from when I used to race go karts as a kid. It was rebuilt and refreshed and is sitting in my parents basement all taped up and sealed. It is set up for methanol. You think it would be worth selling or converting to gas and sticking in a mini bike or something?

[@motormouth2472]

Might try to find me one of these for my bicycle. Are these engines cheap/easy to find and work on? I'm sort of new to this stuff, so any information would be greatly appreciated. Hope you like the engine

[@brettwilliams1415]

Looks like s stock engine with a raptor racing sticker on her. So pretty much its just a stock briggs .you could even over rev that thing or it will blow up .no bullet rod or flywheel and stock cam and doesnt even have the roller bearings in block lol this engin isnt racing .it just has the sticker for good looks

[@freddysoto7021]

#100

[@raincityfishing3405]

Where did you buy your intake manifold from? Or did you weld up your own

[@Mike-ig6jk]

What kind of horsepower did this make ?

[@tribulation138]

So no mods. But its called a racing engine