Staton: What size friction roller?

Discussion in 'Friction Drive' started by Happy Valley, Jul 23, 2008.

  1. Happy Valley

    Happy Valley Active Member

    Curious on any recommendations you Staton friction drive users might have on roller size?

    I know it varies so in my case the variables are:

    210 lb. rider, mostly flat ground along the river valley where I live but there are some hills too. (most of the roads run along the river) Not long steep grades like western mountains but more rolling hills up out of the valley.
    Engine wise, the Robin EHO35.

    Appreciate any insight in this regard, thanks.
    Last edited: Jul 23, 2008

  2. billintexas

    billintexas New Member

    I run the stanton 35 cc robin suburu with 7/8" roller on a moon dog by Kaluna.I get 22 mph flat land 15 up a steep hill and 25 plus down any hill.MPG suffers at 100mpg im 230lbs and dont peddle except take off..and some hills at least part of it anyway. Hope this helps.
  3. Happy Valley

    Happy Valley Active Member

    Yup it does, thanks Bill, and thanks too for mentioning the variable of what bike you're using. I'm thinking about a 26" wheel mountain bike.

    So, I guess the smaller the roller the less it's laboring the engine?
  4. SirJakesus

    SirJakesus Guest

    Yeah smaller roller and you get more torque from the engine but you get a lower top speed. The moon dog is 26in wheel as well so you're looking at the same setup and expectations.
    Remember with these 4 strokes that they're not meant to be run at full RPM for extended periods. You may be able to get away with a larger drive roller and therefore less engine RPM and higher top and cruising speeds if you're willing to peddle a bit more. Generally following river valley roads is more than flat enough to go with a higher gearing. I'm going to order a staton friction kit soon for my girlfriends use but I'm ordering a couple drive rollers for different uses, especially if I remove the engine for some off roading on my current pedal bike.
  5. Happy Valley

    Happy Valley Active Member


    What size range in rollers will you order?

    For my set-up I was thinking of going with a 1", maybe that's too small?

    Ya think there's much difference in the 1 1/8"? 1 1/4?
    Last edited: Jul 23, 2008
  6. 5-7HEAVEN

    5-7HEAVEN Guest

    My 35cc Robin had a 1.125" roller on my 20" Dahon bike. It was a good starting point. I believe this roller was a good match for my 190 lb. frame.

    Now I have my friction drive with 2.2hp Mitsubishi engine on my 26" cruiser bike. A good match again, especially when I installed an exhaust and got more revs. I just ordered the 1.375" and 1.5" rollers for more top end. I might upgrade to an 10,000rpm engine.

    The Mits engine was screaming at 30mph with the 1.125" roller. The Subaru pooped out on level ground at about 26mph.

  7. Happy Valley

    Happy Valley Active Member


    Pooped out, as in top end speed?

    How was the Robin with the 1.125" power-wise from a stand still or up a slope?

    I'm wondering along the lines of what SirJakesus said about having to wind the Robin engine too high in the power band.
    Last edited: Jul 23, 2008
  8. 5-7HEAVEN

    5-7HEAVEN Guest

    In other words, I was out of the Subaru engine's power curve at the high end. I was also out of the Mitsu's power range at 30mph, but this engine's revs continued to climb.

  9. SirJakesus

    SirJakesus Guest

    I have no idea what sizes I'm going to order Happy. I emailed Staton about it. I'm going with the mits43 engine and wanted to get something with a properly sized spindle to cruise 22-25mph without revving up too much but keeping in power band so probably 27-28mph top speed. This is for my girlfriend who is by no means a hot rodder and enjoys taking it easy and looking at scenery. I was also going to get something really small for the times she just wants to use her bike as a peddler and I want to use my Schwinn hardtail motored off road. So torque would be of utmost importance in that application.
  10. Happy Valley

    Happy Valley Active Member

    Yeah, well thanks Sirjakeus, you got me thinking about over-winding the little 4 stroke.
  11. Mountainman

    Mountainman Active Member

    I am kind of wondering -- if I am getting a good top speed from my Subaru 35cc Station friction drive with 1" roller ? My top speed seems to be 22 mph. And while going downhill at around 25 mph the governor kicks in.. Happy Riding from - Mountainman
  12. Happy Valley

    Happy Valley Active Member

    Really. The Robins have a governor?

    Is there drag resistance from the roller going downhill?
  13. SirJakesus

    SirJakesus Guest

    Ahhh! David S drives me nuts sometimes. He promptly replied to my email but he just told me that if I have a nuvinci and my girlfriend has the same bike I wouldn't be satisfied with the friction drive and to go with at least the gear and chain drive. He didn't answer any of my questions or listen to my reasoning behind friction drive since I want it easily removable, lightweight and easy for her to use. I guess I'll just have to do my own research into which drive roller I should order. She lives in a second story apt with a screened in deck that she can store the bike on so weight is a definite factor. I would even strain lifting my nuvinci setup up a flight of stairs as it's just about all I can comfortably handle flipping over by myself to remove the wheels. I guess I'll just have to order what I think is best despite his "recommendation" sorry I couldn't be of any input Happy.
    As far as drag resistance there should be some, especially if you have the engine revved up enough to engage the clutch it will engine brake. Otherwise unless you lift the drive roller off the tire you'll get some drag from the roller deforming the tire and spinning the clutch bell around. I couldn't imagine it to be much drag though and considering the fact that you can order the dual engaging posts and simply quick release the engine off the wheel in a couple seconds for prolonged pedaling its pretty much a non-issue. I have also heard the robin subaru engines are wonderful and they're probably a bit more quiet than the Mits 2-stroke with the added benefit of using straight non-mixed gasoline. For my neck of the woods it just wouldn't cut it unless I ordered a really small drive roller since we have very steep and constant hills around here. To find a mile of completely flat road in this state is not short of a miracle so the extra HP of the Mits is the way to go for me. I already have one too so I know how its configured and that it's a superb quiet 2-stroker. It also has lots of upgrade parts available for it since it's used on some go-peds and pocket bikes.
  14. Happy Valley

    Happy Valley Active Member


    Yep, I hear you NH boys walk around with one leg shorter from walking the side hills so much.:lol:

    Actually where I live in western mass is right at the junction of the river valley and the Berkshires so I got some hills too to negotiate.

    I hear ya on the implied convenience of the friction drive, plus being able to swap it out from bike to bike. Just not sure if it is the right way to go. Tempting but today with all this rain it don't look good. I don't anticipate riding in the rain but the years I had a motorcycle I know I used to dodge under a bridge during a shower and then make a dash for home when it let up on wet roads.

    Hmmm, decisions.

    What you said about David S in spades, probably be the final reason why I can the FD idea.
    Last edited: Jul 24, 2008
  15. Mountainman

    Mountainman Active Member

    My Robin sure does seem to have a governor ? -- kicks RIGHT OUT AT AROUND 25 mph.. If there is no governor -- I have a problem with my engine.. I think that many are getting a better top speed also.. Happy Riding from - Mountainman
  16. motman812

    motman812 Member

    I've got a Staton 35 Honda with a 7/8" roller on a '81 Schwinn Cruiser 5, I weight about 180 and ride on mostly level streets at the beach. Top speed is 21 mph on level ground and that is plenty fast for me. The low end torque is marginal as is and I am very happy I have the 7/8" and not anything larger. Everything in life is a trade off, the trick is getting what's right for you at any particular time and place.
  17. stude13

    stude13 Active Member

    hi; why do people get hacked at mr staton when he wont kick it with them on the phone? try calling the ceo of chevrolet. mitch
  18. 5-7HEAVEN

    5-7HEAVEN Guest

    IMO, Dave S. is a good guy. He might recommend conservatively, though. The 1.125" roller he suggested was great for me. When I bought his chain drive, he said I'd like it much better than the friction on my Dahon. I hadn't played with the chain drive much, because it spat out the master link on two occasions. I was also tired of riding my 20" Dahon, so I mounted the friction drive on my cruiser. That Mits combo w/1.125" roller is a joy. Too bad the chain drive won't fit onto the cruiser.

    I should be getting my new rollers soon. Does anyone know how to remove the clutch drum from the roller? I'm having a hard time doing so. Also, do you just pound out the old bearings and roller as a unit?
  19. Happy Valley

    Happy Valley Active Member

    Wiser words were never spoken.;)
  20. Happy Valley

    Happy Valley Active Member

    The CEO of GM has someone that at least answers the phone.:cool: