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Post by solo2racr on May 16, 2008 19:52:10 GMT -5
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Post by G Man on May 16, 2008 19:58:50 GMT -5
I got a bit creative today and made a new chain guard/roller. I made it from 1/8" sheet aluminum with the roller made from Delrin nylon. It's adjustable in tension to allow for different size C/S sprockets. What I didn't put in the pic is the 7/8" spacers that hold it out from the mounting lugs for the stock cover. Now that right there is a sweet piece! Is it a one off or would it be feasible for you to carve up some more? G Man |
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Post by solo2racr on May 16, 2008 21:52:31 GMT -5
I have enough aluminum to do 2 maybe 3 more if I lay them out right. The Delrin for the roller I have plenty of. I would have to get more bearings but they are pretty cheap. I kept the pattern so doing more isn't a big deal. It takes a few hours to cut the piece, bend and drill, machine the Delrin and the axle for the bearings. I am running a 15 tooth C/S sprocket and the adjustment is all the way up so, I would think that one could go up to a 17t sprocket with the adjustment that is there. Heres a couple pics with it on the bike   |
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sven
Full Member
Posts: 166
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Post by sven on May 17, 2008 6:15:09 GMT -5
Very nice!
But ain't 1/8" a bit too thin?
I mean there's no inner support for the axle,
won't the chaintension (when braking, the wheel
pulls the engine and the tension is on the lower
part of the chain) bend the sheet?
Regards
Sven
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Post by solo2racr on May 17, 2008 10:09:21 GMT -5
Very nice! But ain't 1/8" a bit too thin? I mean there's no inner support for the axle, won't the chaintension (when braking, the wheel pulls the engine and the tension is on the lower part of the chain) bend the sheet? Regards Sven I thought the same thing. This is just the first one so I will see how it goes. When I bent the top over, it was pretty stiff. I don't know if the alloy of the sheet is from the 6000 or 7000 series of alloys. Nor the T #. It could be something like 7075 T6 in which it more than likely will be fine. On the other hand, it could be 6063 or another of the 6000 alloys and then it would be a problem. Going just from what it took to bend it, it may very well be a 7000 series alloy. If I see that the aluminum is starting to bend or if the roller starts to wear more on one side, I'll know. Got to do the R&D in some manner ;D |
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sven
Full Member
Posts: 166
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Post by sven on May 17, 2008 12:21:14 GMT -5
If it doesn't work you can mount the roller as I suggested but leave the thingy cause it's the best looking sprocket cover ever!
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Post by solo2racr on May 18, 2008 18:40:10 GMT -5
I just put the bike on the scales and the front came to 137lbs. and the rear at 133lbs. That's a total of 270 lbs (122.7kgs) dry. That is 90 lbs (40.3kgs) less than a stock bike.
Needless to say, I'm rather happy with the weight. I was guessing it would be about 290-300lbs. Always better to get more than you had hoped. ;D
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Post by aero on May 19, 2008 3:02:40 GMT -5
My bike, pre-project was weighed last MOT at 155KGs. Thats basically the difference a motad exhaust and a battery eliminator made to the standard bikes 163KG. So 122KG is the taget is it! I was hoping to get below the weight of the XT500 at 115KG. So far I've remade all the wheel spacers in HE30 ally, as well as a load of other parts, ally tank, ally swing arm, plastic mudgaurds etc etc etc! I'm at the wonderously time consuming stage of matching the heads of bolts to look like 'aero' engine bolts commonly used of most of today's jet engines.  Great work BTW I'm enjoying seeing your build comming along, wish mine was going so well! |
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sven
Full Member
Posts: 166
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Post by sven on May 19, 2008 15:47:25 GMT -5
... I was hoping to get below the weight of ... 115KG. A street legal SR500??? With stock frame and engine??? Wire wheels??? Ambitious! Best regards Sven |
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Post by aero on May 20, 2008 3:27:47 GMT -5
I know...as I go on I'm finding this more and more! I like a challenge. ;D I can't wait to get it finished and weighed to see how near I get. The XT500 is 115 KG out of the box, so that's why I choose that figure. Apart from the frame, hubs, engine, forks and yokes nothing remains of the orginal bike, even those parts have been hacked away and modified. (only justs qualifies to keep its original reg which is why I got it registered before I started as I doubt it would get through when I finish the bike.) Anyhow enough hi jacking this thread!  |
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Post by stevec5000 on May 20, 2008 8:35:37 GMT -5
What kind of bolts are those used to mount the new chain guard?
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Post by solo2racr on May 20, 2008 10:22:07 GMT -5
What kind of bolts are those used to mount the new chain guard? HA HA .....caught me. Those are Honda bolts. 6x1 thread with an 8mm head. I just didn't have any socket head bolts handy that were the right length. BTW.....heres a nice place to get all those light weight bolts. I haven't tried them yet but the site looks good. www.non-ferrousfastener.com/ |
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sven
Full Member
Posts: 166
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Post by sven on May 20, 2008 10:26:32 GMT -5
The XT500 is 115 KG out of the box, so that's why I choose that figure. What kinda helium XT are you talkin about? A stock XT500 weighs 150kg!!! Mine about 117, but it's far from street-legal. Lookin forward to read yours! Regards Sven |
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Post by aero on May 20, 2008 10:53:17 GMT -5
Yours must be one of the very late models, and yeah I'm getting mixed up with the TT, which is 115KG out of the crate.
Like I said it will be a challenge and I want to see how close I get to it.
The SR is already at 150 (if you discount the fuel in it) just by dumping the standard exhaust for a pattern one and the battery. Between a seat that weighs a fraction of the standard one, ally tank and swing arm, plastic mudgards, and a whole load of other stuff that simply won't be there I think 125 is easily do-able. Getting below that will be where the fun starts. I've already remanufactured a full set of wheel spacers in ally. Don't know where you are in the world, but in the UK you can be road legal with very little of the bike's orginal features. You don't even need lights of any sort if you want to go mad.
Any how I've started a thread so you can snipe/add constructive criticism as you feel!
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Post by davewfc603 on May 20, 2008 19:00:49 GMT -5
very nice chain guard, with all the talk lately I, picked up a very tuff xt500, with a blown spare motor, additionally the comment of when you get it going that it is much stronger than my stock engine was, so.... cleaned the plug, got it to start once on choke, took a lot of crud out of the carb... feeling good, kicked it.... kicked back.... hey I know these bikes.... kicked back.... the bike won.... my ankle is trash for about a month 5 days before taking off for a long weekend in the mountains it's funny
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