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  #3351  
Old 03-25-2012, 11:14 PM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motor bike today?

I added a rubber pipe coupling to my velocity stack, creating a place to stretch air filters over (I use stretch bandages, but plain cotton t-shirt scraps ought to work well too)

http://images.lowes.com/product/conv...18018355lg.jpg


I got some good fuel hose from Lowes, too.
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  #3352  
Old 03-25-2012, 11:20 PM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motor bike today?

Oh, wow! That's really deluxe! I meant like this
http://i305.photobucket.com/albums/n...m/DSCF0266.jpg



These are made for bicycle derailers, but should work for other uses on MABs, if no heavy load is applied on them (not sure if they can handle pedal starting).
Carmichael Sealed Pulleys
http://www.bikepro.com/products/rear...l_alloy_pr.jpg


SRAM and Performance/Nashbar also offer some. They are usually $15-30 for a pair and will last forever on a bike. I had some on a road race bicycle and they did speed it up a couple mph, by less friction. They never squeaked or went dry either.
Quote:
Originally Posted by Scootmeister View Post
Hi Rustycase. Tensioners have been an issue since motorized bicycles entered the scene. The problem is not with the theory, it's with the way kit tensioners are designed. Anything mounted to the frame that can rotate is a problem, it's just not going to stay in place. I have a Yamaha enduro with a factory installed chain tensioner that works great, but it's designed so it cannot move and get in the way of spokes and other moving parts. As HappyCheapSkate points out, the solution is to come up with a custom design that fits your bike. The pivot point needs to be stationary, and alignment needs to be correct. You can experiment with the length of the pivot arm and the strength of the tension spring to minimize drag while keeping the chain tight. Here are a couple I designed for my Stiletto bobber. The Giant Stiletto came with a 7-speed hub, so the rear wheel is not adjustable making a tensioner necessary. I used the derailler's threaded pivot hole as the pivot point for the tensioner and used a kit-supplied roller with bearng. On the front tensioner, I used the wheel off of the derailler. If it starts to wear I will switch to a bearing set-up. As Happy suggested, I used steel or aluminum strap for the pivot arm. I hope this helps.
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Last edited by happycheapskate; 03-25-2012 at 11:25 PM.
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  #3353  
Old 03-25-2012, 11:28 PM
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rustycase rustycase is offline
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Default Re: what did you do to your motor bike today?

Will that roobber coupling be fuel-proof, Happy?

It might get ate up!


Took the Schwinn Southport apart again, today, to tweak the frame.

Rag-jointed sprocket would not line up with the ht output sprocket so we aligned the tail section to match up better.

I held the bike horizontal, over a stack of wood blocks, positioned right behind the kickstand mount, and he stomped on the dropouts, one at a time, 'til we got where we needed to be. it worked out well.

Xcept... now I gotta dish the rim a bit closer to the chain so the bike will track properly.

Always something!
Replaced a buncha bolts in the rag joint... my kid swapped 'em out. He didn't keep it aligned while doing it, so it's got abt .090 lateral runout, this time around. Not terrible, but I wish it was better. I had it VERY good, yesterday... lol

If it doesn't rain tomorrow I'll have him take it for a spin, before we make any more changes.

I'm gonna try the coil mounted to the seatpost, up high... I think...

Best
rc
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  #3354  
Old 03-25-2012, 11:55 PM
Scootmeister Scootmeister is offline
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Default Re: what did you do to your motor bike today?

Thanks for the link to the Carmichael Sealed Pulley, Happy. I like the fact that it's alloy and the sealed bearing should last forever. Have you dealt with Bikepro?
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  #3355  
Old 03-25-2012, 11:56 PM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motor bike today?

The rubber coupling should be fine. It does not hold the velocity stack on the carb, only tunnels air into the v-stack, and holds the filter screen. The point is to move the screen farther away from the v-stack, and hold a bigger circle of cloth to breathe through. Plus it protects the carb some from impacts if my leg hits the boot getting on/off the bike.
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  #3356  
Old 03-25-2012, 11:58 PM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motor bike today?

No, but I can recommend Ebikestop(fast shipping), niagaracycle (great prices), performancebike, nashbar (real brick and mortar stores in TX and other states, as well as mail order), coloradocyclist (expensive), and cambriabike (kind of expensive).

Quote:
Originally Posted by Scootmeister View Post
Thanks for the link to the Carmichael Sealed Pulley, Happy. I like the fact that it's alloy and the sealed bearing should last forever. Have you dealt with Bikepro?
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  #3357  
Old 03-26-2012, 03:16 AM
MEASURE TWICE MEASURE TWICE is offline
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Default Re: what did you do to your motor bike today?

Quote:
Originally Posted by happycheapskate View Post
Oh, wow! That's really deluxe! I meant like this
http://i305.photobucket.com/albums/n...m/DSCF0266.jpg
http://motorbicycling.com/showthread.php?t=11815


These are made for bicycle derailers, but should work for other uses on MABs, if no heavy load is applied on them (not sure if they can handle pedal starting).
Carmichael Sealed Pulleys
http://www.bikepro.com/products/rear...l_alloy_pr.jpg


SRAM and Performance/Nashbar also offer some. They are usually $15-30 for a pair and will last forever on a bike. I had some on a road race bicycle and they did speed it up a couple mph, by less friction. They never squeaked or went dry either.
===============================

HC is that your picture:

http://i305.photobucket.com/albums/n...m/DSCF0266.jpg

I am interested in where you got the four clamps that go around the tubes on the left half of the rear dropout. They look like they are stainless straps that form a clamp but are not adjustable. They have black rubber insets that go between the metal part of the clamp and the tubes.

I expect I'll have to experiment to see if the size diameter and shape (round/ovalness) if there is a problem using them on a different application than chain tensioner for the amount of stress they can handle and also the bike tube I have tube differences.

I got some parts that clamp for plumbing of two types, but think I have seen this kind in the picture you posted and may try them instead as they are lighter than the cast metal ones I got. If so I may try to return to Lowes some parts and see if they have the ones that look good for the bike that are one in the picture you took of that plate mount with chain tensioner.

I am making a way to attach a skeleton cover that a fabric will go over to make an art bike vehicle to resemble a California Sheepshead Fish and this will be a way to attach the skeleton and make it removable as well.

MT

Last edited by MEASURE TWICE; 03-26-2012 at 03:22 AM.
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  #3358  
Old 03-26-2012, 04:00 AM
motor_bike_fanatic motor_bike_fanatic is offline
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Default Re: what did you do to your motor bike today?

I did a couple things over the weekend. Saturday, I did some maintenance work. Took apart my rear hub so I could check my bearings, because for some reason I occasionally get a little bit of play in the axle. Been that way ever since I got this rim around Christmas of 09. Anyway, bearings were fine, repacked with red grease and reassembled. Think I finally figured out the proper way to adjust the tightness of the axle. Also on Saturday, I adjusted my pedal crank and fixed my brake cable which was badly frayed. On Sunday, I stripped and scraped spraypaint off my gas tank. Its a plastic two gallon yamaha tank. I started out trying to strip it with brake fluid, but there were so many layers of paint from several bad paint jobs. I barely got through the first layer with a whole bottle of brake fluid. Ended up scraping the rest off. Hopefully tomorrow I will be able to get some new brake pads. Dont think I ever had new pads on this bike, since the handbrake was used when I got it, and I dont think I ever changed the pads. My cruiser came with a hole in the frame for the rear fender, and since I removed the fender, I discovered I was able to add a rear handbrake. I have had the handbrake for almost two years, so I am definitely due for some new pads. New pads should make my brakes rock solid. They arent too bad now, but I also have a foot brake. My next big plan is to upgrade my headlight. Currently using a home modifed bullet headlight that puts out around 6v. I have a 12v spotlight that my wife's brother in law gave me. Gonna get a 12v SLA battery and use the spotlight as a headlight. It shines about as far as a car's headlights. Gonna be a little while till I have the money for an SLA battery and a charger though.
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  #3359  
Old 03-26-2012, 04:08 AM
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DaveC DaveC is offline
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Default Re: what did you do to your motor bike today?

As I do very badly in cold weather my bike has been on hold...sorta. Winter expences about kill me and the lack of funds slow things to a crawl. But all winter I've been getting small stuff, nuts, bolts, header wrap, and last month a SA X-FDD Dyno hub brake for the front. Here recently I've been making up a template for the steel I'll be using for a motor mount. I was going to use a kind of lattice girder looking arangement for the mount but decided that the 2 lower mounts on the S5 E Morini motor just needs the 2 plates welded to the lower frame and seat post. 2 smaller mounting points on the top bar for the head mounting lug and I don't think it will go anywhere ...except down the road.

I am going to have to rework the ItaliJet expansion chamber tubing where it twists around in front of the motor. No clearance for the pedals. Get that done and the rest should be fairly straight foreward.

Looks like I'm about to start back on my build thread
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  #3360  
Old 03-26-2012, 04:35 AM
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happycheapskate happycheapskate is offline
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Default Re: what did you do to your motor bike today?

It is not my picture. The clamps are called conduit clamps, though and come in 2 or 3 pcs in 1 pack for about $1.50-4, in different sizes. At Home Depot, they come in little ziplock bags, so you could try one gently and put it back to return it if it doesn't fit.
It came from thread http://motorbicycling.com/showthread.php?t=11815
I used 1 for my coaster brake strap. BEEFY. Coaster brakes are a death trap if the strap snaps! This big rubber coated steel strap makes me feel a lot better.

Quote:
Originally Posted by MEASURE TWICE View Post
===============================

HC is that your picture:

http://i305.photobucket.com/albums/n...m/DSCF0266.jpg

I am interested in where you got the four clamps that go around the tubes on the left half of the rear dropout. They look like they are stainless straps that form a clamp but are not adjustable. They have black rubber insets that go between the metal part of the clamp and the tubes.

I expect I'll have to experiment to see if the size diameter and shape (round/ovalness) if there is a problem using them on a different application than chain tensioner for the amount of stress they can handle and also the bike tube I have tube differences.

I got some parts that clamp for plumbing of two types, but think I have seen this kind in the picture you posted and may try them instead as they are lighter than the cast metal ones I got. If so I may try to return to Lowes some parts and see if they have the ones that look good for the bike that are one in the picture you took of that plate mount with chain tensioner.

I am making a way to attach a skeleton cover that a fabric will go over to make an art bike vehicle to resemble a California Sheepshead Fish and this will be a way to attach the skeleton and make it removable as well.

MT
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