450 transplant on klx250sf?
#3
Are you a very experienced fabricator and welder, or do you have unlimited funds to pay someone else for the job? These types of projects are not impossible, but they are nothing like dropping in a big block V8 Chevy into a vehicle that had a small block V8 Chevy. Everything from chain alignment, output shaft angles, exhaust routing, etc., etc., etc. can be extremely challenging. I'm not trying to throw a wet blanket on your idea here. Anything is doable with enough time, money, and know-how.
Also, have you thought about how a simple steel frame like the KLX which is designed to house a sub-20 horsepower engine will react to a 50 hp monster 450 racing engine?
Also, have you thought about how a simple steel frame like the KLX which is designed to house a sub-20 horsepower engine will react to a 50 hp monster 450 racing engine?
#6
That was my main reason of thought, I'm in Oregon and you can't place an MX bike so I thought it would be tricky to put a none legal engine on a street legal bike. I think it would be doable but I was mostly wondering if anyone had tried it personally?
#7
It's interesting that shows like Overhaulin', Fast and Loud, and many others can give one the impression that a mechanical pursuit of any kind is done relatively quickly and without too much headache. Heavy editing and big budgets can make anything look easy.
But...I don't say any of this to dissuade anyone from going for it. There are people out there with enough talent, equipment, experience, and tenacity to get it done.
#8
Service Honda! They make the bikes Honda should. They take modern frames and install the old 500 two stroke motors in them. They also have a CRF150R chassis and stuff a CRF250R motor in it. That would be a fun bike. I know they are not street legal, but still a good reference.
Honda Junior-R 250, Honda Trail Bike, Honda 2010 Jr. Trail Bike, Motorcycle
Honda 500AF Motocross Bike, Honda 500 Dirt Bike, Competitive Dirt Bike, Racing Bike
Honda Junior-R 250, Honda Trail Bike, Honda 2010 Jr. Trail Bike, Motorcycle
Honda 500AF Motocross Bike, Honda 500 Dirt Bike, Competitive Dirt Bike, Racing Bike
#9
Service Honda! They make the bikes Honda should. They take modern frames and install the old 500 two stroke motors in them. They also have a CRF150R chassis and stuff a CRF250R motor in it. That would be a fun bike. I know they are not street legal, but still a good reference.
Honda Junior-R 250, Honda Trail Bike, Honda 2010 Jr. Trail Bike, Motorcycle
Honda 500AF Motocross Bike, Honda 500 Dirt Bike, Competitive Dirt Bike, Racing Bike
Honda Junior-R 250, Honda Trail Bike, Honda 2010 Jr. Trail Bike, Motorcycle
Honda 500AF Motocross Bike, Honda 500 Dirt Bike, Competitive Dirt Bike, Racing Bike
#10
Maybe don't go for a 250 or 450 mx motor, there may be a motor with more power that would be a better fit with less fabrication? Could be from honda kawi, yami, suzi, idk. Maybe measure for 'best overall fit' and then decide if it's worth the time.