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Post by anomoly40 on Apr 18, 2009 18:04:59 GMT -5
Well, I was washing my scooter the other day and noticed my rubber motor mounts were dry rotting and cracked. I got online and noticed they were $7 plus shipping each. I wasn't going to pay $30+ just to have them crack in a year. So I set out to make some Delrin ones at work. Now delrin is a hard plastic thats very machinable and has been used as motor mounts in plenty of vehicles that are way more powerful than our little scoots. It will also keep the excess engine movement due to the compression of the rubber bushings. But on the same hand you will have a little more vibration.  This is a picture of one of the bushings I'm talking about.   This is the part I made to replace the bushing.  This is my replacement in the swing arm/cradle. I have yet to install these on the motor because of the weather, so I can't tell you how it changed the ride. But I can tell you the factory bushings are a pain to remove with out a press. If you want specs, just PM me and I'll get you some pics of mine along with measurements. I'm not a saggy teat and don't mind doing the "leg work" for you as long as I'm helping out the Scooter community in some way. I know a local machine shop that I've given the specs to so if you need help finding someone to do a quality job, I've got you covered there. I'll give you their phone number so you can deal directly with them as I'm not trying to make a profit from this. As this sites motto says "It's all about the ride". |
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Post by JR on Apr 19, 2009 7:30:43 GMT -5
www.mcmaster.com/#plastics/=1ifuc0This will work just as well and your bushing looks to be right at 3/4" OD but if it's a hair smaller then I have a tool that I can cut in down in a simple drill press. It's Kevlar/Nylon great stuff. Just click on the rods and discs and look for this. You can order this cut like you want and one foot of 3/4" is only $15.43 which should make about every bushing on the scooter. This material is hard enough to take the punishment and also self lubricating in fact I don't think you would even need a center steel bushing but if you did then you can order most bushings to fit also. Getting the old rubber bushings out, just take a torch and get them hot and then you can push them out with a screwdriver. JR
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Post by kliff on Apr 19, 2009 7:56:03 GMT -5
He's just trying to be helpful JR, and it is an excellent appearing piece. 'course, what would a saggy teat know about stuff like that?! LMAO!
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Post by JR on Apr 19, 2009 8:43:41 GMT -5
No doubt NO doubt and they are excellant looking pieces and I have talked to Analmoly40 and he's a good dude!! He is lucky too as he can make some of these for himself kind of like I used to be able to make stuff at the plant where I worked. I was also just trying to show him some alternative material that as a guy who has done this stuff for years and years can use and if you have some tools you can make them at home. When I talked to him yesterday he told me that he was having to get bushings pressed but I thought they were these new ones and if I'd understood him correctly as to the old ones then I would have told him about the old torch trick yesterday. One thing for sure when he gets it back together he won't have to worry with this again. JR
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Post by xs650 on Apr 19, 2009 8:51:07 GMT -5
www.mcmaster.com/#plastics/=1ifuc0This will work just as well and your bushing looks to be right at 3/4" OD but if it's a hair smaller then I have a tool that I can cut in down in a simple drill press. ...JR What is your drill press tool? Sounds useful. |
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Post by anomoly40 on Apr 19, 2009 12:16:56 GMT -5
Thanks guys, I just did this because I had access to scrap delrin at work. I put a metal bushing in for good measure. I assure you guys I never want to do this again.
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Post by JR on Apr 19, 2009 14:18:58 GMT -5
power-tools.hardwarestore.com/54-393-adjustable-hole-saws/circle-cutter-635144.aspxIt's just like this and what a guy can do is take a piece of round stock that is larger than you need find the center and adjust the cutter to the desired OD and simply shave off the excess until you have the desired in this case bushing. It comes witha 1/4" center bit so if that's not big enough then drill it to the desired size you want after you cut down the OD. You can also use this to cut different sizes of holes just by adjusting it. JR
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Post by anomoly40 on Apr 19, 2009 14:53:59 GMT -5
Well I got them in and I took it for a test ride. There is a little more vibration at low speed crusing at <33 cm(China Meters) or 20 mph. But other than that, the vibration is the same. The reason I done this was because I wanted a more responsive throttle, if I wanted to go all out I would have done the suspension bushing also. But I accomplished the goal of a fairly stock vibration with a more dependable part that won't break down.
Things I have learned doing this project.
1. A Dremel is not a lathe.
2. Friends can help, but make sure they don't have internet on their phones. You'll be doing it by yourself.
3. If that friend happens to like wrestling you'd be better off finding your wife to help. Otherwise you'll know all about the Hardy boys internet show "The Hardy Show". Trust me it's the stupidest thing you'll ever see.
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Post by xs650 on Apr 19, 2009 15:17:44 GMT -5
power-tools.hardwarestore.com/54-393-adjustable-hole-saws/circle-cutter-635144.aspxIt's just like this and what a guy can do is take a piece of round stock that is larger than you need find the center and adjust the cutter to the desired OD and simply shave off the excess until you have the desired in this case bushing. It comes witha 1/4" center bit so if that's not big enough then drill it to the desired size you want after you cut down the OD. You can also use this to cut different sizes of holes just by adjusting it. JR That's incredibly obvious now that you have 'splained it. ;D I never thought of using a hole cutter as an inside out boring bar.  Thanks and have a bone. |
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