Dogtrousers
Kilometre nibbler
I have no clue about legality, but it certainly sounds like an interesting project. Don't hesitate to keep us informed/entertained with whatt you do 

But there's no challenge in that for me, plus it's not very exciting.
Everything is already there except the actual cycling gear so I don't need to worry about brakes etc.
The engine is 1000cc and automatic gearbox so it's very large and spacious, easy to weld the gear into the chassis with all that out.
I'm going to build a simple shaft drive from pedal crank to rear differential drive. If I keep the sizes right I'm aiming for Sherco trials bike type gearing, in 1st.
I'd say it was like pushing a small to midsize motorcycle in neutral now that it's a rolling chassis. But if I change the wheels it'll be easier again. It's currently got 12 inch wide mud pluggers fitted.
You're intending using the wheels and brakes as fitted?But there's no challenge in that for me, plus it's not very exciting.
Everything is already there except the actual cycling gear so I don't need to worry about brakes etc.
The engine is 1000cc and automatic gearbox so it's very large and spacious, easy to weld the gear into the chassis with all that out.
I'm going to build a simple shaft drive from pedal crank to rear differential drive. If I keep the sizes right I'm aiming for Sherco trials bike type gearing, in 1st.
I'd say it was like pushing a small to midsize motorcycle in neutral now that it's a rolling chassis. But if I change the wheels it'll be easier again. It's currently got 12 inch wide mud pluggers fitted.
This is certainly an issue, though I'm hoping that the ATV being a recent import from the states will help as there's diddly squat for it over here.
If not, it'll be an off roader only which is okay, I live on a farm on the Moors and there's plenty of trails and fields, though the roads are my main goal.
Hello!
I've been looking around but can not find much regarding this, was hoping someone on here could help.
I'm wanting to build a mountain quad, like a mountain bike but with 4 wheels.
I'm going to take a full-size American ATV, strip it down and weld in the cycling gear but I'd rather it was road legal so I can use it like I do a mountain bike.
So does anyone know what the size and weight restrictions are in the UK?
Thanks.
OK, fair game. Looks like it's a "let's see if this can be done" kind of project then. Good luck, but (with my automotive engineer's hat on) you may find that it's far more trouble than what it's worth. If you can get it to work, I shall be impressed.
I'll still say that a scratch built chassis will give you far better functionality as a 4-wheel MTB given how big and bloated most American-based machinery tends to be, but then as a 4ft 11 female, the idea of pedalling something with the heft of a good-sized motorbike uphill has absolutely no appeal at all...![]()
You're intending using the wheels and brakes as fitted?
With the extra rolling resistance from the tyres, and the friction from the shaft drive, I doubt very much you'll get it going under your own power. Heaviest load to date, moved under my own power was a third of a metric ton. This doesn't include rider weight. And that didn't move very fast uphill, took a fair bit to stop it. And a fair bit of forethought about stopping it.