bike engined 4x4 2 seater buggy

[own81]

hi ,just trying to make up my mind on how to set up a buggy im going to start building soon.
i found an old sandrail frame at the dump and an going to turn it into a 4x4



im after help to decide what to run in it .
the axles are going to be hilux steer at both ends full hydro.
not sure on suspension yet but will prob be A frame both ends.

now here is the drive line combos i was thinking.
fwd turbo 4cyl.running north south prob easiest.

and the latest i was thinking to keep it light is a road bike 1000cc motor midmounted using a quad bike rear axle like this.

mounted under it with drive shafts off each end to diffs using the reverse on axle cause bike gearbox doesnt have reverse .
i will run a extra pully off centre axle to run alternator and use a 12V power box hydrolic set up for steering.

this was just somthing different i thought of any input would be great thanks

cheers owen

[johnsy86]

honda fwd motor, box n diff is the transfer simple and plenty of poke or any equivelant motor but a nuts vtec would be cool

[RED60]

I think you'll break the quad bike bits easy as with either car or bike (1000cc) motor....

[own81]

yeah that was my only concern on how strong the parts would be .as with the honda engine whats the advantages of this over say a sr20det .

[johnsy86]

any fwd engine can be made to work doesnt have to be a honda.

[AndyH]

SR20DET. x2
Hard motor to kill. (I did after heaps of punishment and way too much boost)
Cheap to build into a weapon and heaps of poke.

[St Jimmy]

Stick a 13b in it, no weight big hp up to 500+ with the right turbo

[own81]

a rotory would be good but than i need the gearbox transfer .overall to long for what i want but would be sweet.

[flyinwall]

use the bike engine running through a modified zook transfer to what ever diffs you choose, by doing it this way you have the revs and 6 speed gearbox (and you also get reverse in the modified zook transfer)

check out this 4x4 buggy build
http://www.minibuggy.net/forum/projects ... 4-st3.html" onclick="window.open(this.href);return false;

and this link showns the modified zook transfer to get reverse (about 1/4 way down the page)
http://forum.difflock.com/viewtopic.php ... &start=480" onclick="window.open(this.href);return false;

if you use the bike motor you will end up with a nice light buggy
oh and why was the frame thrown out (and why cant i find a score like that)

[own81]

thanks flyinwall i have been trying to find builds like that .i never thought to do something like that but i am wondering how the gear ratio's would go as i was wanting to run
35's or 37's but i suppose i could run 33's as i could get reduction for transfer and ill be running 4.88 in diffs as i have a few laying around.ill be looking into this and see the options.
oh and the frame i found on the scrap metal pile at the dump i has a bit of rust in a few tubes and a slight twist in the front,but for $75 its a good start so i couldnt leave it there.

[flyinwall]

if you take a look on youtube there is a couple of bike engined zooks on there that do pretty good and i think that the frame might be a bit too light if you are planning on running larger tyres.
I myself would limit the tyre size to a 33" max and use lux diffs and with the zook tcase if you do the modification to make it a reverse box you will lose the low range but you could also get the gearing down with different sprockets ratios when you connect the bike motor to the zook tcase with chain drive

where are you by the way (if you end up changing your mind about using that frame i would love to buy it from you)

[own81]

yeah i have seen them all on youtube and there is a guy who put a copy harley engine in his i think its called ground howg he used a uni from a jeep to couple the engine to sierra gearbox with a custom clutch set up. i think the set up of the bike engine and transfer will determine size of wheels 33's would be good as this wont be much of a crawler as i have my hilux for that which is why i was thinking bigger tyres as i could just inter change them from one to the other .but it all depends on the gearing i supose.
ill have to try work it out.

[own81]

well after a week of searching the web for ideas i think i have a combo i will use .
1000cc bike engine coulped to a t90c borg warner 3 speed to a zuk transfer.short and light with hi,low range and reverse.



this last picture is an adaptor which can be bought for a sproket replacement .i will be using one simular but incorperating a v drive pully for the alternator.

[RED60]

No.1 how much are those little borg warners and where do you get them..
No.2 if you can get a warn out clutch plate that fits their spline, you could use that fitted with a sprocket to join to the b/w.. you will also have to stop the sprocket walking along the shaft at all.. a spacer will work on the spigot end but you'll have to something more at the g/box end since the shroud is not spinning with the shaft..
No.3 if you connect to the spline indicated there, you will have to support what would normally be the spigot bearing end in a ball/tapered bearing because of sideloads on the shaft from the chain drive..... meh... you'll figure it out

[flyinwall]

thats going to be very very low geared if you do it that way

[Clanky]

HyaBusa
http://www.youtube.com/watch?v=IMWFdGjN ... re=related" onclick="window.open(this.href);return false;

http://www.youtube.com/watch?v=qyIs9O7oDsA" onclick="window.open(this.href);return false;

http://www.youtube.com/watch?v=24qflKsT5DE" onclick="window.open(this.href);return false;

[own81]

red60 the bike engine and gear box wont be chain driven it will have the sproket removed from bike engine and replaced with a flange (last pick above) which will be joined
to a shaft via a rubber flex-joint the same as a vy commodore drive shaft so shouldnt need a baring on input shaft to gear box as they will be fitted solid in line in a type of cradle mounted to buggy.as for the low gearing i shouldnt be a prob as if its to low just go up a gear in the bike box and so-forth has been done plenty of times .just takes time searching the right forums .
check this one out it does it all and mine will prob be lighter.
http://www.youtube.com/watch?v=OUGNBO9mf7Q" onclick="window.open(this.href);return false;

[own81]

here is some info on the gear box

http://www.novak-adapt.com/knowledge/t90.htm" onclick="window.open(this.href);return false;

should be strong enough as they used to get used for v8 conversions and a bike engine has no where near the torque of a v8.

[5inchgq]

Firstly mate good luck with the build.

But being a bit of a bike nut I find myself asking a few questions, Are you sure you need a bike motor that will rev to 14 000 rpm and only make 100 to 170 hp ? Bike motors make screaming top end power but not massive amounts of torque.
Strength of the bike motor/gearbox is another concern, they were only ever designed to move say up to about 200kg, I dare say your rig will weigh a bit more than that.
Please don't take any of what I have said the wrong way, like I said mate good luck with it but the things I mentioned might be something else to consider.

[flyinwall]

bike engines are good as they have a good power to weight ratio and when you use the revs with the right gear ratio you can turn large tyres quite easily
what other motors make 150hp+ per liter and weigh so little with a gearbox attached

[own81]

im quite confident that a bike engine will work fine on something like this .its mainly going to be driven in the sandy river at the back of my block so mostly going fast. there isnt alot of crawling around townsville ,but i have a hilux built for the slow stuff this will be more an allrounder.
i also found l list of weights from diffs to gearbox's to tyres on zukikrawlers .ill post a link tomorrow its helpfull for all things 4x4 to pre determine an approx weight of your build. like a full built hilux front diff disk to disk is 100kg rear is 70kg ,a sierra transfer is 25kg.

[own81]

made a mistake the link for weight is on pirate4x4

http://www.pirate4x4.com/forum/showthread.php?t=749400" onclick="window.open(this.href);return false;

here it is has almost all engine tyre gearbox ect common to 4x4s.

[pootrol]

yeah i like the front wheel drive car engine gearbox set ups. low easy power delivery and not reving the ring out. every things easy and ready to go. with the weight and build why does every one think you need a 2ltr etc. i know its heaps of stick but its not a drag car. what about litle 3cyl 4cyl 1 litre injected combos. be cheap and easy. looking forward to seeing ya build mate. also using factory alternator set up is the only way to go not trying to jump off drivetrains etc. you might find it is only charging some of the time that way.

[stilivn]

Any updates. Have you got a build thread on this anywhere.

[own81]

gday stilivn i havent started the actual build yet just getting together all the ideas and info for it at the moment . i have been researching the suspension set up i want to put in it lately which will be very different to the norm.im going to make a cantilevered coilover with hydrolic rams fitted horizontal so it is more compact and have a decent amount of adjustability in height.

[flyinwall]

have you started the buildup on this yet

[own81]

no not yet but it wont have the bike engine anymore its going to have a v8 with 5 speed and single transfer. on lux steer diffs .just need to finish my dual cab then will start on this.

[flyinwall]

good luck but i think it will get pretty twisted with that setup unless you brace everything

[own81]

yeah ill be building a chassis for it then drop the frame on top .