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Motorized Bicycle General Discussion All topics regarding bicycles with engines.

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  #6091  
Old 10-04-2013, 12:13 PM
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Pluto Pluto is offline
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Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by crassius View Post
yeah, good price on those clairmonts right now - bought three to do - so far 3 of the 6 fenders have broken & been repaired
Sorry to hear that. Mine were fine I think. Have to double check as I knew I did not want them. They are yours if you want them. Just come get or pay for ship.
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  #6092  
Old 10-04-2013, 02:37 PM
crassius crassius is offline
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Default Re: what did you do to your motorized bicycle today?

the bracket is what snaps off even after putting spacers in the front brakes to keep the right arm from pushing on the fender - just typical chinese crap, but they look good and are on sale cheap : ) We're paying $149 at walmart for them.

I make really strong brackets & rubber mount so fender can sway left/right a bit.
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  #6093  
Old 10-07-2013, 03:59 PM
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Danschutz Danschutz is offline
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Default Re: what did you do to your motorized bicycle today?

Fixed the air leak on my intake (new stud) took it for a ride and the plug was dripping wet which was great news because I gained torque but lost top end. Swapped out the jet and then threw the drive chain at about 17 mph. My ninja like skills held me from face planting over the bars lol.
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  #6094  
Old 10-07-2013, 04:10 PM
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Danschutz Danschutz is offline
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Default Re: what did you do to your motorized bicycle today?

Quote:
Originally Posted by happycheapskate View Post
Here are a couple wheels for you.

Alex rim, Wheelmaster built bolt on freewheel hub. I just got one of these for a bike. It's nice for classic stuff.
$27
http://www.niagaracycle.com/categori...h-ss14g-spokes

$40, Alex rim, 12-G stainless spokes 36h bolt on wheel, for 5/6 speed (shouldn't have to spread your frame much if any)
http://www.niagaracycle.com/categori...-ss-spokes-36h


I've run 3 speed freewheels on generic multi-speed hubs before. You can use them on BMX (singlespeed) hubs, or multi-speed hubs, as long as the axle spacing and wheel dish are correct or compensated.

Here: $10 for one, and free shipping, cheaper by the dozen!
http://www.sourcingmap.com/bicycle-s...-p-268417.html


Note: if your axle wasn't severely bent, and you didn't ride hundreds of miles on it that way, the races should be fine. You can get another axle for around $10 at BMX or bike shops, or off junk bikes.
Sorry for the late response it was super nice and informative answer.

On the multi sprocket wheels where the freewheel sprocket screws on there looks to be a long spacer that screws onto the axle. Can this be just cut to length after putting it all back together to fit the rear frame? Probably not, way to simple lol.

Thanks again (x1000) for the links, that's a great place to buy most any part I need as my local stores are, well snobs. My buddy took his trek in for a new fork and they charged him 25 bucks and even cut the stem. I went and got the same fork for an old non trek bike and it cost me 40 bucks and they wouldn't cut it for that price. Had I known what they charged my buddy I wouldn't have supported them. Bummer as I like to support locals.

Dan.
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  #6095  
Old 10-07-2013, 05:46 PM
Scootmeister Scootmeister is offline
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Default Re: what did you do to your motorized bicycle today?

Big day in the workshop. Removed my rear wheel with damaged Shimano hub and took it to my bikeshop for repair. Removed the Bontrager tire that split when i hit a bump. Yanked the 2-stroke engine and reinstalled my old reliable HuaSheng. It should be fun running a HS with a 3-speed hub. Need to install a jackshaft. Will fit a motorized bicycle rear tire for more traction for trail riding and pulling my trailer. I;m enjoying motorized bicycles again after a stint with mopeds.
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  #6096  
Old 10-07-2013, 09:26 PM
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mrfubs mrfubs is offline
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Default Re: what did you do to your motorized bicycle today?

i confirmed a "new find" piston that will work in the 66cc stroke and with a reed valve only.


THE PLUSES

- Less friction/reduction of cylinder wall wear by 35% or Greater.
- 1mm thick chrome pated piston rings instead of 2mm thick non plated.
- reed windows in piston for reed valved engine only*
- wrist pin bearing stays put no "walk

CAN ONLY BE USED ON THE ENGINES WITH THE "SHORTER CON ROD" 110mm

http://www.ebay.com/itm/70cc-PISTON-...296f1f&vxp=mtr
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  #6097  
Old 10-07-2013, 10:08 PM
Ouch that Hurt Ouch that Hurt is offline
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Default Re: what did you do to your motorized bicycle today?

Did the usual weekend make sure everything is still tight check. CHECK. I haven't experienced anything coming loose so far as I have read in some other peoples posts.

Replaced my entire rear wheel assembly because the tire I had on developed a wobble. Damn, that there stock rear sprocket assembly is a pain in the a$$.

Pretty sure I got a head/gasket leak as there is oil residue around the fin on the top of the jug. Been trying to tighten it slowly over the last couple of weeks but, it doesn't seem to be working. Gonna have to try the Flat glass/sand paper method to see if I can get it to seat better. ****ty cast parts.

Running a grubbee skyhawk GT-2A bone stock except for the expansion chamber with muffler from BB. Lots more bottom end torque with this muffler set-up.

Cruise through town with a little off-roadin thrown in.

PEACE

Last edited by Ouch that Hurt; 10-07-2013 at 10:14 PM. Reason: forgot stuff- NGK B7HS and aftermarket plug wire.
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  #6098  
Old 10-08-2013, 01:09 AM
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mapbike mapbike is offline
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Default Re: what did you do to your motorized bicycle today?

Went on a 14 mile ride, to a nearby very small town where I go to pay my water bill, nice ride.

I put my Dax through a good test today on that ride and found out what the bike will run WOT which is where I kept it for 90+% of the way there and back, my Dad wanted to cruise over there with me so he jumped on his Yamaha vStar 1100 and followed me, my clutch is slipping only after 120miles on this engine, I guess its a bit powerful for those soft rubber pucks, anyway my bike is pulling my 215lbs at 45-46MPH on the flat with no head wind and 48MPH @8240RPM on a decline.
These numbers are taken from my Dads bike speedo and my Tach I have on the bike, My speedo isn't consistent and normally reads 45MPH WOT, on the way back I was bucking a little wind and still maintained a fairly steady 42MPH on the Flat.

Carb is acting up a bit so I'll be getting my Dax RT Carb on it and tuned before to long.

I need a shift kit on this bike some day so I can have a nice 40mph cruise speed without reving this engine at 8000+RPMs constantly.

pulled the clutch cover earlier and pulled all the pucks out, dang near had to chisel them out, pretty junky looking actually, so I'll be making me a new set out of some qulity material soon.

Map
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  #6099  
Old 10-08-2013, 02:40 AM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motorized bicycle today?

What spacing is on your bike, now? 120? 126?

Yes, the spacer on the right is just a steel bushing, pinched between the right cone/nut and outer locknut. If you're shooting for 120mm spacing, just remove both spacers, and put the shorter spacer (and maybe a few washers before it, to clear the FW) on the right side. You may have to re-dish the wheel.


You can replace it with a nut of the same threading as the axle, or use tight-fitting washers. You could saw/grind the spacer, but it's easier just to use others.
For the 3 speed freewheel, you can remove that spacer and replace with some washers. You won't be able to use a Freewheel Remover on those. You have to use the "destruction method" of removal if you ever want it off. (simply, tap the lockring loose and remove all the guts, clamp FW body in vise, turn wheel).

The 3spd fw is the same width as many heavy duty BMX 1 spd freewheels.

Note: If you severely re-dish the wheel to compensate for moving the FW far right, you may have to un-lace and re-lace the wheel, by swapping the spokes from drive side to non drive side. Easy, really, and the wheel will look sharp.

Quote:
Originally Posted by Danschutz View Post
Sorry for the late response it was super nice and informative answer.

On the multi sprocket wheels where the freewheel sprocket screws on there looks to be a long spacer that screws onto the axle. Can this be just cut to length after putting it all back together to fit the rear frame? Probably not, way to simple lol.

Thanks again (x1000) for the links, that's a great place to buy most any part I need as my local stores are, well snobs. My buddy took his trek in for a new fork and they charged him 25 bucks and even cut the stem. I went and got the same fork for an old non trek bike and it cost me 40 bucks and they wouldn't cut it for that price. Had I known what they charged my buddy I wouldn't have supported them. Bummer as I like to support locals.

Dan.
Attached Images
File Type: jpg 3 speed freewheel.jpg (61.5 KB, 40 views)
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  #6100  
Old 10-08-2013, 04:46 PM
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xseler xseler is offline
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Default Re: what did you do to your motorized bicycle today?

Finally got my carb adjusted back to the 'normal' altitude of the OKC area......lol! If I ever take it back to the high mountains, I will have a different carb for it. The CNS just wasn't a happy camper up there.

I also went to Midwest Hose and got some more high temp silicone hose to cover my exhaust joints on the SBP expansion chamber. I was able to use longer pieces that were able to better secure the connections. It's now tight enough that I may be able to delete the springs that hold the pipe to the engine.... To do anything more substantial will require the 'investment' in a welder.
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