fastest/most reliable motor setup

[twosmoke30]

ok guys i'm asking these questions bc i'm making a future list to which i will go to.

i'm looking for the fastest mph(not so much brute torque, i'm shooting for around 75ish so i can cruise around 60) most reliable motor setup, this would include (tranny, bbk, clutch, etc..)

i'm looking for a setup for less that 2k, but this is giong to be a long process so it'll most likely end up being more than that

thanks

ethan

[PlanetMinis.com]

[PitRacerVince]

gonna be a great list to see cant wait!

[jmurray192]

Would buy an used motor from pm DOHCS under 2000 listed right now

[Z]

ok guys i'm asking these questions bc i'm making a future list to which i will go to.

i'm looking for the fastest mph(not so much brute torque, i'm shooting for around 75ish so i can cruise around 60) most reliable motor setup, this would include (tranny, bbk, clutch, etc..)

i'm looking for a setup for less that 2k, but this is giong to be a long process so it'll most likely end up being more than that

thanks

ethan

You may strongly consider upgrading the suspension on your bike first before doing any sort of motor work if you want a 75mph ZB50.



1. You'll want at minimum a disc brake in the front and have the forks gone through.

2. You'll want at minimum an upgraded shock in the rear



Nobody makes a disc brake setup for the stock ZB50 wheel unless you convert a pair of NSR50 forks to be used with a Monkey R front disc hub or purchase a complete Monkey R front end. Not the most fun parts to source. Talk to S10onbagz (here on PM) on what he did for a Monkeybike conversion using NSR50 forks and a Monkey R Hub.



Before doing anything else, take a step back and make a list of all the parts you want and discuss with others how they work together. You are currently all over the place and are going to end up spending more in the long run if you don't plan your build out carefully.



ZB50's are not safe in stock form at 75mph. The brakes and suspension are not up to snuff.



Just my opinion, others may disagree.

[twosmoke30]

You may strongly consider upgrading the suspension on your bike first before doing any sort of motor work if you want a 75mph ZB50.



1. You'll want at minimum a disc brake in the front and have the forks gone through.

2. You'll want at minimum an upgraded shock in the rear



Nobody makes a disc brake setup for the stock ZB50 wheel unless you convert a pair of NSR50 forks to be used with a Monkey R front disc hub or purchase a complete Monkey R front end. Not the most fun parts to source. Talk to S10onbagz (here on PM) on what he did for a Monkeybike conversion using NSR50 forks and a Monkey R Hub.



Before doing anything else, take a step back and make a list of all the parts you want and discuss with others how they work together. You are currently all over the place and are going to end up spending more in the long run if you don't plan your build out carefully.



ZB50's are not safe in stock form at 75mph. The brakes and suspension are not up to snuff.



Just my opinion, others may disagree.

disk brakes?? nah..i dont' need them, i'll just remember to brake 20o yards earlier than normal



yeah i know i'll need to upgrade the suspension, but what is the difference between the nsr forks and the zb's? i read on here that they are basically the same thing, just different damping/valving

[twosmoke30]

would a good 88 setup be able to pull a 5 speed?

[50rider340]

it prolly could, but a 88 would be hard to get up to that speed.



You have a choice of two different ways of a engine build.

China which will be a big cc engine, with a 4 speed, example say a lifan150, as what is nice about them they have a oil filter, sick clutch cover, and from minimob you can buy a takegawa super head to drop right onto it to make it really move. In my opinion, that would be the best way to keep the price down but have best of both worlds.



Other would be go honda base such as a honda nice engine, or a built up 124 but plan on breaking your price range a huge amount.



My buddy is running a evo 140 in his c70 (big 17 inch rims) so with that and a 16 tooth front sprocket he hits close to 75, so the chinese engines are easily capable of this. To boot he has put close to 7 K on it over the past 2 summers and it is still running strong.



If i were you buy one of the 150 motors from terry (firepower minis), then take what you have left and buy a takegawa +r super head from mini mob that is made to go on this type of motor, and you will have one killer setup, that should hit the speeds your looking for.

[twosmoke30]

would a better setup be like a tb106 or 117 witha 5 speed? that could probably pull it better than the 88 right?

[twosmoke30]

i dont really want to go china, because i'll have to deal with the wiring compatability between the zb and the china motor

i'd rather build up my 50 motor

[Z]

ZB50 and NSR50 forks are valved the same and both are 30mm fork legs. However, the ZB50 does not have any hangers to run a caliper and there's no way (without lots and lots of work) to mount a rotor on a stock ZB50 wheel.



If you want to keep the stock look, you run NSR50 fork legs, find a Monkey R hub, 220mm rotor and custom space the caliper and rotor to work together.



s10onbags has done this and can tell you the modifications needed to make it all work.



The other option is to run a different front hub and find a matching front hub and wheel for the rear or run an NSR50 swingarm, adapter, offset triple clamps, NSR50 or aftermarket 12" wheels, convert to rearsets for disc brakes and give it a go.



Read my ZB50 build thread as thre are lots of different combos.



In regards to an engine, can an 88cc pull a 5 speed? Depends on the 5 speed and your front and rear sprockets.

[firepower354]

Some of the offset-bored 56-57mm top ends and 54mm cranks (133-138cc) with a reasonable head and a 4-speed could pull those speeds. Like Zed sed, chassis first. I made a lap of my sub with a stout mill in my larger CL70 and got scared only four times. Once at each corner

[twosmoke30]

ZB50 and NSR50 forks are valved the same and both are 30mm fork legs. However, the ZB50 does not have any hangers to run a caliper and there's no way (without lots and lots of work) to mount a rotor on a stock ZB50 wheel.



If you want to keep the stock look, you run NSR50 fork legs, find a Monkey R hub, 220mm rotor and custom space the caliper and rotor to work together.



s10onbags has done this and can tell you the modifications needed to make it all work.



The other option is to run a different front hub and find a matching front hub and wheel for the rear or run an NSR50 swingarm, adapter, offset triple clamps, NSR50 or aftermarket 12" wheels, convert to rearsets for disc brakes and give it a go.



Read my ZB50 build thread as thre are lots of different combos.



In regards to an engine, can an 88cc pull a 5 speed? Depends on the 5 speed and your front and rear sprockets.

ok cool, i think i'll look into the (stock look option) i dont' really want the 12 inchers

yeah i definitely read it, tons of info

i figured the 5speed/clutch that twobros sells, and say a ported fp88 kit

[twosmoke30]

Some of the offset-bored 56-57mm top ends and 54mm cranks (133-138cc) with a reasonable head and a 4-speed could pull those speeds. Like Zed sed, chassis first. I made a lap of my sub with a stout mill in my larger CL70 and got scared only four times. Once at each corner

mmk, i'll start with my chassis then, like i said guys

this is a future list i will look to (basically i'll have everything already figured out before i go out and buy it all, so i dont' have to worry about buying soemthiing, then it not workin/me not liking it)



what 4speed would work with that kind of cc's?

[50rider340]

would a better setup be like a tb106 or 117 witha 5 speed? that could probably pull it better than the 88 right?

You could easily take the stator plate right off of your ZB motor and plop it right onto a chinese engine to eliminate that problem. Also TBs are 108s as they come with a 51 mm crank. A 106 is utilizing a 50mm crank made by takegawa.



I have a built takegawa 106 motor in my C70 right now. It has a 4 speed, and a ported E22 head from AHP, in addition i cut new lashes in the top of a takegawa super head piston to work with the E22 to get a massive amount of compression.(its for sale to 350 and its yours) The fastest ive gotten it up to is 55 on a flat But that is with bigger rims so more stuff for the engine to turn. You will have to go bigger to get the speeds your looking for.

[DuckBoy]

Rebuild stock engine to stock specs an get a china motor. To see if your truely into it if so sell the china motor an build a nice motor. Fast an reliable is not cheap especially at those speeds.

[twosmoke30]

Rebuild stock engine to stock specs an get a china motor. To see if your truely into it if so sell the china motor an build a nice motor. Fast an reliable is not cheap especially at those speeds.

haha FINALLY YOU POST SOMETHING BRIAN!!

i've decided on doing this instead of dumping money into the stock engine

[pesk]

Go for a Nice engine.

[racerx351]

I run GPX 125cc mild mods like a crower cam ported head better valve springs ported mainfold 25mikuni card a kitaco up sweep pipe on my ST-90 and she has seen 70 plus just not enought room to fully open her up that was at 8900rpms!! sp am sure a honda motor will pull harder !! i can't wait to fit a new larger motor in her close to 200cc and am sure she will pull like a raped ape ..lol

[racerx351]

i dont really want to go china, because i'll have to deal with the wiring compatability between the zb and the china motor

i'd rather build up my 50 motor

as for the wiring that's easy and the china motors today pull so hard still for a fraction of the cost to a honda motor!!

check out the forums .... you will how to wire it up

[Kawipartsman]

Like other guys said at those speeds you would need a Front Disc Brake. Things come up really quite at 70+ mph. Those stock brakes are built for around 40-45 mph max. Anything more you will just be heating them up to much all the time.

Engine wise building the Z50 Base engine even to 117cc and pushing high speeds all the time it won't last nearly as long a a Honda Nice engine.

Good luck with the Build. ZB 50 are great little bikes.