Swapping a CRF450 engine into my CBR125 - custom build - part 1

A custom motorcycle build series showing how I fit a CRF450 engine into my CBR125 chassis. The 450 has 4 times the horsepower, but weighs almost the same as the 125 engine!

[@foreignperception2593]

I have wanted to do this for years but never did, I'm so glad to see someone that is, what a fun back road bike that will be, I'll be following this build, cheers bud.

[@spkslab]

Yeah, I can’t wait to race around quiet back roads and do the occasional tack day on it. Thanks for following!

[@kcrichton7485]

This is the coolest build on youtube mate, fantastic

[@spkslab]

Thanks mate! I hope it encourages other people to have a go at building custom bikes!

[@kcrichton7485]

@@spkslab I'm starting my engineering course at college in a month or two, I'd love to be able to swap some nice forks onto my bike, fingers crossed

[@spkslab]

Mate if I can do it anyone can haha. You will be definitely able to do it, if you have any questions while you are doing it just ask. I'll be more than happy to help if I can.

[@bayworksracing8568]

Just found this channel. What an interesting project I am hooked 👍

[@spkslab]

Thanks for tuning in!

[@dbjf3]

I have been waiting for someone to do this for awhile now. Keep up the awesome work.

[@spkslab]

Thanks! I can’t believe nobody has done it before to be honest, hopefully my bike will inspire more people to 450 swap their 125’s!

[@madecam3892]

Ive been searching fir upgrade luke this for a long time.couse i have same bike 👍

[@tomc8051]

This is seriously impressive

[@spkslab]

Thanks mate! I’ll have some updates coming soon.

[@R3d1100f]

I cant find a 2 stroke motor like that in America for less than 2000$.

[@spkslab]

Mine is a 4 stroke, they are easier to find than 2 strokes.

[@kcrichton7485]

Do you think you could get away with a front and rear mount and forget about the top and bottom?

[@spkslab]

Yeah, I did consider trying it with just the front and rear mounts, but I have come up with a plan for a top mount that I an working on at the moment. I'll show what I came up with in the next video 🤙

[@kcrichton7485]

@@spkslab nice one, can't wait to see it

[@deadprivacy]

Whats the swinger you are using? I just found a stripped crf for 450 and a complete duke front for 250 and im staring at a crashed cbr125r with a decent engine i can sell...

[@spkslab]

swingarm is from an 07 KTM SXF

[@deadprivacy]

@@spkslab i know, i found it...took some doing..i qa oausing the video and wverything tryingvto get a clear shot.