Peerless 700 Build? Need Help!

[GoodWComputers]

Considering using a Peerless 700 5-speed w/ reverse that I have laying around to give my kart project more gearing options and (most importantly) reverse. I've done the research on race-prepping these transmissions. I've searched around on this forum and read every other Peerless thread I could find as well.

My main questions are:

How do I figure out what type/size of sprockets I need to make this work?

Where can I get sprockets that will fit onto a Peerless 700?

Current setup is a Honda GX160 horizaontal shaft engine using a belt drive to another shaft powering the rear axle via 420 chain. I'd like to switch to a 10hp Tecumseh vertical shaft engine that I recently rebuilt.

 

[mckutzy]

I think this goes in the other parts section.

 

[redlinemotorsportts]

Ive thought about just going to tractor supply and buying the sprocket, centering, and welding it to a brake disk (that you already have). Not sure how strong it will be but that's what im thinking about. Bracing the imput shaft (aluminum casing that surrounds the input shaft) is important, and oil filling too. I think you can put 420 chain in place of the stock reverse chain witch will greatly decrease the chance of the stock chain breaking inside the case, and blowing the case apart.

Doc is a whizz on these trannys, he has like 3 or something, i cant keep track. Good luck on your build.

 

[ML-TOYS]

Once doc sees this he should give you some info

 

[Doc Sprocket]

I'm here... LOL

Okay- the tough question first: Gearing. This is a bit of a head scratcher at the best of times, and largely depends on a few factors. What is the purpose of your build? How fast and over what terrains are you intending to go? How large are your rear tires, and have you a particular set of pulleys in mind? Do you have any idea what the final (high gear) drive ratio of your particular 700 is?

There's a lot to consider here, a lot to work out and plan. Some food for thought:

*The 700 was available with 3 common high gear ratios: 3:1, 2.6:1, and 2:1. You'll need to figure yours out.

*The accepted standard is to overdrive the 700, even when race prepped. Apparently, they can handle high RPM better than they can handle high torque. So- Put a larger pulley on the engine than on the input of the 700, and use the sprockets to reduce to the desired final drive ratio.

*Output sprocket. Shopping Evilbay or maybe even your local OPE dealer, you should find that there were several output sprockets available from the manufacturer. I can get you tooth counts and part numbers later.

*DIY output sprocket: many people (including myself) have taken a factory Peerless brake rotor, of the type fitted on all 700, 800, 900, and MST models, and welded a sprocket to it. Any good farm and agriculture store will have "Weld On" sprockets that are designed to go with specific hubs. Skip the hub, just align it well on the sprocket and go. I found that wrapping and tacking a strip of 16ga steel around the rotor's hub, sized it pretty nicely for the new sprocket.

*The slightly better DIY option: The STEERING WHEEL HUB that BMI Karts sells here- http://www.bmikarts.com/Steering-Wheel-Hub-_p_1453.html reportedly fits the 700's output shaft splines, and therefore offers you a potential bolt-on option. You'll have to drill a sprocket to suit.

*I have heard of not-so-clever folks filing a flat on the output shaft, and securing a 5/8" straight hub with a setscrew and/or key. Do not do this. The actual shaft size is under 5/8" (forget measurement ATM) and you'll lose concentricity. Won't run true either.

 

[Doc Sprocket]

For your researching pleasure- I grabbed this shot out of one of my Peerless manuals, showing output sprocket part numbers and specs...

 

[GoodWComputers]

Once doc sees this he should give you some info

Wow... I believe that you were correct Sir.

I'm here... LOL

Okay- the tough question first: Gearing. This is a bit of a head scratcher at the best of times, and largely depends on a few factors. What is the purpose of your build? How fast and over what terrains are you intending to go? How large are your rear tires, and have you a particular set of pulleys in mind? Do you have any idea what the final (high gear) drive ratio of your particular 700 is?

- Off-road kart with big knobby tires.

- What's the best way to determine the final (high gear) drive ratio of my 700?

I'm here... LOL

*The slightly better DIY option: The STEERING WHEEL HUB that BMI Karts sells here- http://www.bmikarts.com/Steering-Wheel-Hub-_p_1453.html reportedly fits the 700's output shaft splines, and therefore offers you a potential bolt-on option. You'll have to drill a sprocket to suit.

Just ordered this... >$10, figured why not.

 

[itsid]

- What's the best way to determine the final (high gear) drive ratio of my 700?

well that should be fairly easy

make a mark on the output shaft,
and turn the input shaft until the output shaft made exactly one rotation.

if it needs two rotations of the input shaft its 2:1
two and a ~half 2.6:1
or ~three 3.1:1

'sid

 

[GoodWComputers]

Just ordered this... >$10, figured why not.

Dang... $9.95 minimum purchase required. What else can I buy to bump up my total? Any recommendations?

 

[itsid]

maybe a small #41 sprocket that you can drill holes into like this:
http://www.bmikarts.com/41-Sprocket-with-58-Bore-B-Type_p_1050.html

*shrugs*

'sid

 

[rmm727]

Here's what you want.

http://eccarburetors.com/store/700-quick-change-sprocket-hubs.html

 

[rmm727]

and this.

http://eccarburetors.com/store/40-sprocket-fits-trans-sprocket-hub.html

or

one of these. Cheaper than buying a hub if the small tooth count will work for you.

http://eccarburetors.com/store/sprocket-8t-40-31-spline.html

 

[Doc Sprocket]

That is cool. But, works out to about $40 for a lousy sprocket and hub. I am WAY too cheap to NOT DIY my way through that!

 

[rmm727]

by the time he payed for shipping thru BMI he'd be about there. They aren't exactly cheap in the shipping department.

If he can use the smaller tooth count sprockets, its a direct bolt on for $10