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.

[@BustedKnucklesBuildsTexas]

Nice engine

[@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

[@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

[@minibikemadman]

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

[@stevezevallos3735]

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

[@DS-ss7vl]

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

[@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

[@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?

[@wrench]

Put it to use brotha

[@raincityfishing3405]

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

[@robertanderson635]

RCF, I built / welded this manifold, it took three attempts, but it worked out well.

[@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,

[@cobster3]

It's a Briggs and Stratton raptor racing 5hp I have on that fits the discretion

[@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

[@natelloyd6312]

A stock Briggs is cheap and all of these are stupid easy to work on! These raptor engines and racing engines though can get a bit pricey!

[@samtarariverasanchez59]

U looking at 300 starting point for these raptors

[@motormouth2472]

@@samtarariverasanchez59 thank you for letting me know

[@Mike-ig6jk]

What kind of horsepower did this make ?

[@downtownrednek6882]

5

[@freddysoto7021]

#100 🏁🐺🇨🇷🇨🇷🇨🇷

[@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

[@robertanderson635]

Brett, I think you need to look closer at the engine, if you are at all familiar with what makes a Raptor motor a “Raptor” then there is NO doubt this motor is in FACT a Briggs Raptor engine, and the sticker has nothing to do with it.

[@shatnersufolanded7785]

Some of the first Raptors were in fact single Pto Bearing and Kool Bore so I would say it's a Raptor.

[@user-qu7cx9us6u]

​@@robertanderson635 Just saying i have a old raptor briggs. It has roller bearings on each side of the case
were the seals are.

[@tribulation138]

So no mods. But its called a racing engine

[@testerbois5993]

doesn’t have an governor on it