Bike builders that have machine tools/shops

[Tom from Rubicon]

I did some checking on that Shimano hub and the bearing inside it went bad on the cassette side. The bearing on the
other was ok. I did some checking on the spoke size and the wheels are the standard #14 which aren't heavy enough
for the 79cc or especially the 212cc engine. A wheel that is a good steel wheel with the larger bearings used in a
coaster brake might be the way to go with #12 spoked wheels. I am still considering the mag wheels but I've also
seen fellas that had problems with them on the YouTube reviews. I think some of the problems were done by them
not knowing what they were doing mechanically, no "common-sense?"

Yeah EZL, when you were talking Mag wheel. I just not easily kept my trap shut. Glad you found out about Mags.
12ga. spokes are a minimum requirement in our applications, My Flyer has a https://mbrebel.com/product/sturmey...-drum-brake-wheel-26-x-2-125-11-gauge-spoke/
And the rear Worksman wheel has a Shimano 110 hub.
I never measured the spokes but have more mass than the front spokes.
Tom

 

[Tom from Rubicon]

Just ordered a 41b13 sprocket for the reduction drive.

The long story is, when attaining perfect alignment of the Bully output sprocket with the reduction drive input 35a42 sprocket.

From there the inboard 41a13 output sprocket no way will align with the 41a44 rear drive sprocket.

I have devised two solutions. The right and the easy. Reliability is up for grabs.

#1 From engine output side, to shorten the driveshaft extension bringing the clutch inward closer to the engine case.

#2 Modify a 41b13 sprocket. B sprockets have .500” wide hubs. It is for me to determine how much hub width creating an offset which will not perfect but make workable the drive sprocket alignment.

For now #2 is my only option. #1 can be done. I have another 79cc Predi, which I am going to send to AGK for the full treatment.

I can get a steady rest for my Logan lathe and do it in house or farm it out.

Being 68years and thinking like a 30yr . One must take stock.

When in doubt, Party On!

Tom

 

[EZL]

Yeah EZL, when you were talking Mag wheel. I just not easily kept my trap shut. Glad you found out about Mags.
12ga. spokes are a minimum requirement in our applications, My Flyer has a https://mbrebel.com/product/sturmey-archer-xl-fd-90mm-front-drum-brake-wheel-26-x-2-125-11-gauge-spoke/
And the rear Worksman wheel has a Shimano 110 hub.
I never measured the spokes but have more mass than the front spokes.
Tom

That looks like a great setup for braking! I've been looking over the mag wheels and the Husky wheels with the coaster
brake. One thing I see a big problem with on the mag wheels is, a fella would need to order a GPS speedometer and
they aren't cheap especially the Garmins. I need the extra bearing size on the bear axle and really don't need a
coaster brake. The Husky Wheel:
http://www.huskybicycles.com/mm5/merchant.mvc?Store_Code=hb&Screen=PROD&Product_Code=500-220
What are your thoughts on this?

 

[indian22]

Tom we used to say "eyes on the ground & a#** on the line trumps HQ mission plan". I've tackled the offset problem on several bikes now and settled for perfect chain lines, though long term reliability may eventually be a problem or not. It's ride and see on the last issue. I'd say your judgement and your call, and you'll be riding rather than pondering and that's a win in my book as long as it's safe.

Rick C.

 

[indian22]

I've used these same wheels front and rear on several bikes & have had great service from them and yes the Workman is a heavier gauge spoke & the wheel, hub & brake better quality than the Rebel rear wheel, but not bad quality for the price.

Rick C.

 

[indian22]

That looks like a great setup for braking! I've been looking over the mag wheels and the Husky wheels with the coaster
brake. One thing I see a big problem with on the mag wheels is, a fella would need to order a GPS speedometer and
they aren't cheap especially the Garmins. I need the extra bearing size on the bear axle and really don't need a
coaster brake. The Husky Wheel:
http://www.huskybicycles.com/mm5/merchant.mvc?Store_Code=hb&Screen=PROD&Product_Code=500-220
What are your thoughts on this?

I'm not so sure the Husky wheel is not the same as the Rebel wheel, same specs with KT coaster brake.

Rick C.

 

[Greg58]

One thing I see a big problem with on the mag wheels is, a fella would need to order a GPS speedometer and
they aren't cheap especially the Garmins.

I’ve been using a cell phone app as my speedometer on my latest bike, it works real good. I checked it with the suv for accuracy and it spot on, I have a expandable phone holder that is great.

 

[Greg58]

 

[EZL]

I'm not so sure the Husky wheel is not the same as the Rebel wheel, same specs with KT coaster brake.

Rick C.

Yes Rick, a big difference in price. Husky is lower in price and if I order what's shown I have to order two rims at the same
time since the front is a black double-wall rim. The Sixthreezero bike has better quality rims on it since the Micargi came
with single-wall rims but a person has to consider the price difference which was almost twice as much between them.

I am thinking about going Husky 11 ga chrome front and the Husky 11 ga with the coaster brake and then in the Winter
get the front rim with the brake-drum system which would match. The BBR mag wheels would be the cheapest but then
again there are some reviews concerning the bolts working loose on the sprocket and aluminum wheel. I am thinking that
could be a big problem on the torque a 212 puts out. Even with the 34 tooth sprocket there's no limit to the acceleration
the CVT gives you. The only way to soak up the torque would be to baby the throttle and put a 30 tooth sprocket on the
wheel. I can say the low-end takeoff is really smooth with no shutter on throttle take
the CVT at anytime as compared to the 49cc's 7G T-Belt drive transmission and a CVT. I never was impressed with the
T-Belt transmission because of the limits it had. Although, the CVT is noisier at low speeds caused by the springs, plates
and pins in the drive assembly. They do clatter around and dry graphite has to be used once in awhile for lubrication.
I had to do more maintenance on the T-Belt system than on the CVT.

I’ve been using a cell phone app as my speedometer on my latest bike, it works real good. I checked it with the suv for accuracy and it spot on, I have a expandable phone holder that is great.

I used a Nexus 7 to check that little 49cc bike but way too bulky!

 

[EZL]

View attachment 101677

I'd be afraid some hot-fingered idiot would see a cellphone mounted in it's holder on the bike and decided he needed
the phone because I forgot to take it off when I parked the bike.

 

[indian22]

I’ve been using a cell phone app as my speedometer on my latest bike, it works real good. I checked it with the suv for accuracy and it spot on, I have a expandable phone holder that is great.

I'm doing the same Greg & verified on motorcycle and auto, spot on for both distance and speed....really handy and charts the speed on extended rides giving top speed and average speed and stops don't count against the average.

Free app.

Rick C.

 

[indian22]

I'd be afraid some hot-fingered idiot would see a cellphone mounted in it's holder on the bike and decided he needed
the phone because I forgot to take it off when I parked the bike.

I keep my phone in my pocket and check ride details when I stop. I never interrupt my ride with phone calls, but return calls when I park the bike or when I feel like it!

 

[indian22]

EZL my 125cc 5speed wet clutch bikes put make way over 10 hp and I've run both for several years with 12 ga. steel wheels and coaster hubs, driving the hub with a three bolt hub adapter & various final drive sprockets and haven't had wheel issues. I don't pop wheelies or do burn outs etc. but I've topped 80mph a few times in short bursts on both bikes which weigh 150lbs. and 175 lbs. respectively, so I'm thinking that 4 years of riding would have shown some wheel weaknesses & it has...hub packing every 300 miles is part of the maintenance routine for rides that average 40mph or more. The faster speeds and greater weight of these machines is super hard on even good bicycle wheels.

Even my 85lb. hybrid is due for repacking the rear (coaster) 'cause I've put a lot of plus 50 mile (one 100 mile) rides on it since I converted to the front hub motor and average of at least 25 mph each trip.

Rick C.

 

[Tom from Rubicon]

EZL, I bought this speedo for my Huffy Davidson.
https://www.amazon.com/EverTrust-Electronic-MANBUREN-Rainproof-Speedometer/dp/B00UWWBOYC
Tom

 

[Greg58]

My problem is I’m running out of space on the handle bars, with my GoPro, phone mount and speedometer there’s no mor room on the level area on either side of the stem. I’m using the small bell speedo to take up as little space as possible. I run a flasher front and rear and have it on the bars at a angle next to the mirror.

 

[EZL]

EZL my 125cc 5speed wet clutch bikes put make way over 10 hp and I've run both for several years with 12 ga. steel wheels and coaster hubs, driving the hub with a three bolt hub adapter & various final drive sprockets and haven't had wheel issues. I don't pop wheelies or do burn outs etc. but I've topped 80mph a few times in short bursts on both bikes which weigh 150lbs. and 175 lbs. respectively, so I'm thinking that 4 years of riding would have shown some wheel weaknesses & it has...hub packing every 300 miles is part of the maintenance routine for rides that average 40mph or more. The faster speeds and greater weight of these machines is super hard on even good bicycle wheels.

Even my 85lb. hybrid is due for repacking the rear (coaster) 'cause I've put a lot of plus 50 mile (one 100 mile) rides on it since I converted to the front hub motor and average of at least 25 mph each trip.

Rick C.

I never had any problems on the 49cc and it has over 3k miles on it when I started building the other bike. I packed the
bearings when I got the bike new. I had a failure on one front bearing but I think it was caused by being on some gravel
roads with it and dirt most likely got by the bearing cup. A fella on Craig's List was building 2-stroke bikes and had a set
of new wheels for sale real cheap, $45 for a pair so instead of replacing the hub on the old wheel I put them on the
bike after repacking them. I don't know why he sold them so cheap it might have been due to not being able to put a
speedometer magnetic pickup on the front spoke? I tried a new electronic one on the wheel and I could not get the
magnet close enough to get it to work with the sensor so I went ahead and put a mechanical one on the bike. I am
going to pull those wheels off and repack the bearings before Winter since I've been using it while I have the 212 down.

 

[EZL]

My problem is I’m running out of space on the handle bars, with my GoPro, phone mount and speedometer there’s no mor room on the level area on either side of the stem. I’m using the small bell speedo to take up as little space as possible. I run a flasher front and rear and have it on the bars at a angle next to the mirror.

I might try one of these the price is not bad:
https://www.ebay.com/p/iGPSPORT-Igs...racket/604475614?iid=401774087296#UserReviews
GPS standalone beats using a mechanical and electronic units with those magnetic wheel sensors.

 

[EZL]

EZL, I bought this speedo for my Huffy Davidson.
https://www.amazon.com/EverTrust-Electronic-MANBUREN-Rainproof-Speedometer/dp/B00UWWBOYC
Tom

I tried one of those or one like it on the 49cc and I couldn't get the sensor close enough to the spokes magnet.
I put it back in the box and packed it away after I put the old style mechanical one back on the bike which is
still working on it.

 

[EZL]

My problem is I’m running out of space on the handle bars, with my GoPro, phone mount and speedometer there’s no mor room on the level area on either side of the stem. I’m using the small bell speedo to take up as little space as possible. I run a flasher front and rear and have it on the bars at a angle next to the mirror.

A Garmin looks good but they are WAY TOO HIGH SPRICED!

 

[Tom from Rubicon]

I tried one of those or one like it on the 49cc and I couldn't get the sensor close enough to the spokes magnet.
I put it back in the box and packed it away after I put the old style mechanical one back on the bike which is
still working on it.

EZL,
The problem with the stock Hall Effect Mag is it doesn't have a great enough magnetic field.
Get some neodymium magnets. I did.
Option #2 make a magnet holder that brings the sensor closer to the mag. Me and a buddy sorted this out a couple of years ago. I got my experience using Hall Effect float switches.
Tom