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Author Topic: Chain support ( guard )  (Read 49752 times)

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Offline Mick D

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Re: Chain support ( guard )
« Reply #180 on: February 06, 2014, 10:02:52 pm »
Quote from: HeavenVMX on February 06, 2014, 09:45:33 pm
Yes Ted I can look at it and read it ::)

I want to download it and be able to print it so I can take it to a meeting. Surprising as it may seem many most racers don't read these posts

Here you go Greg.
http://www.ma.org.au/fileadmin/user_upload/Documents/MOMS/2014_MoMS_Files/16_Classic_Motocross_and_Dirt_Track.pdf
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Offline KTM47

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Re: Chain support ( guard )
« Reply #181 on: February 06, 2014, 10:59:10 pm »
Quote from: Tossa on February 06, 2014, 02:37:16 pm
Quote from: KTM47 on February 06, 2014, 12:36:06 pm
16.15.4.6 Other than CMX/CDT A chain guard made of suitable material must be fitted in a way to prevent trapping between the lower drive chain run and the final drive sprocket at the rear wheel.

There you go Ted your original question has been answered.

http://moms.org.au/rules/18-classic-motocross-dirt-track/18-4-machine-and-class-identification-classic-mx-dirt-track/

So is a change going to be made to Motocross and Supercross regs:


15.22.8 Drive chain protection
 
 
15.22.8.1 Front sprocket may be guarded so as to prevent direct access to the chain or sprockets with the fingers.

No mention anywhere about chain gaurds

I'll leave that one to someone else.  My interest is now Classic MX.  My days of getting MX/SX rule changed are over.  However the rule to have a rear chain guard (guide) should be in each disciplines section.  It was in "All disciplines"
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Offline Nitram

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Re: Chain support ( guard )
« Reply #182 on: February 12, 2014, 10:05:49 pm »
Will this do the trick ? It's a piece of 7mm nylon, and it sits about 1/2" away from the chain's lower run.
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Offline mick25

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Re: Chain support ( guard )
« Reply #183 on: February 12, 2014, 10:19:30 pm »
Quote from: Nitram on February 12, 2014, 10:05:49 pm
Will this do the trick ? It's a piece of 7mm nylon, and it sits about 1/2" away from the chain's lower run.

that should pass, I have seen the same pass like yours.
I made mine with two sides and a plastic bottom for the chain to run over like the moderns.
they do help a bit with chain derails to.
« Last Edit: February 12, 2014, 10:24:04 pm by mick25 »
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Offline PEZBerq

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Re: Chain support ( guard )
« Reply #184 on: February 13, 2014, 12:38:20 pm »
Sometime it doesn't take too much imagination. Husky's are a piece of weasels! Just bolt to the chain guide using original bolts. I will probably use alloy or plastic sheet. Corrugated card may not pass scrutineering  :o. Credit to Mick25 for the inspiration  8)

Other bikes likely could use similar approach, maybe a hose clip around the swing arm if attachment points are missing. More time thinking about it and less time moaning about it worked for me ;D



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Offline Tim754

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Re: Chain support ( guard )
« Reply #185 on: February 13, 2014, 03:33:55 pm »
A win for me !!! Pretty certain the current setup of steel Reynolds tubing, aluminum plate and bolted on Nylon /rubber sheeting on the outfit will pass the chain thingo.... ;)
Note the super lightened front sprocket cover and the folding, spring return footpeg inbetween the frame cradle and outfit... ;D


Now for the bucket racer solo..


 Using all of this roll of bubble wrap should suffice..... ::)
« Last Edit: February 13, 2014, 04:37:21 pm by Tim754 »
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Offline FourstrokeForever

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Re: Chain support ( guard )
« Reply #186 on: February 13, 2014, 04:10:23 pm »
Nice looking pipe on the bucket racer Tim. I think your bubble wrap design could be improved on by at least tapping it to the bike. Afterall, you wouldn't want it fall off as soon as you left the start line  ::)
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Offline Tim754

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Re: Chain support ( guard )
« Reply #187 on: February 13, 2014, 04:27:15 pm »
 'you wouldn't want it fall off as soon as you left the start line  ::)"

Ummm     been there , done that... :o      :D

TBM the pipe is slightly oversize tube, mandrel bent to OEM pattern. Large cone was scrounged from an old "Peter Allen " pipe, reverse cone and muffler packing insert ex Yamaha RD road and road trail bike pipes. This configuration of cones is tuned length to suit the 150cc kit, blue printed head and 26mm carby.   
« Last Edit: February 14, 2014, 10:46:53 am by Tim754 »
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Offline FourstrokeForever

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Re: Chain support ( guard )
« Reply #188 on: February 14, 2014, 09:55:08 am »
Quote from: Tim754 on February 13, 2014, 04:27:15 pm
'you wouldn't want it fall off as soon as you left the start line  ::)"

Ummm     been there , done that... :o      :D

Ted the pipe is slightly oversize tube, mandrel bent to OEM pattern. Large cone was scrounged from an old "Peter Allen " pipe, reverse cone and muffler packing insert ex Yamaha RD road and road trail bike pipes. This configuration of cones is tuned length to suit the 150cc kit, blue printed head and 26mm carby.

Please don't call me Ted.....my name is Mark
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Offline KTM47

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Re: Chain support ( guard )
« Reply #189 on: February 14, 2014, 10:25:48 am »
Quote from: Nitram on February 12, 2014, 10:05:49 pm
Will this do the trick ? It's a piece of 7mm nylon, and it sits about 1/2" away from the chain's lower run.


My one question with this one is if the chain was really lose could your hand go under the cover and go through the sprocket anyway.  Maybe a little bit lower or another block that the chain runs on (chain guide).  But it is definately better than no guard.
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Offline FourstrokeForever

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Re: Chain support ( guard )
« Reply #190 on: February 14, 2014, 10:49:05 am »
Aww come on Kevin.... how about a safety fence with fluro tape around the whole bike.....
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Offline Tim754

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Re: Chain support ( guard )
« Reply #191 on: February 14, 2014, 10:49:58 am »
Please don't call me Ted.....my name is Mark
 I apologize for that silly mistake Mark    :-[     :-*
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Offline KTM47

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Re: Chain support ( guard )
« Reply #192 on: February 14, 2014, 01:45:54 pm »
Quote from: TBM on February 14, 2014, 10:49:05 am
Aww come on Kevin.... how about a safety fence with fluro tape around the whole bike.....

That sounds like a great idea why don't you put that up as a rule change?
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Offline shelpi

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Re: Chain support ( guard )
« Reply #193 on: February 15, 2014, 12:04:43 pm »
 :) :D ;D ;) ah needed a laugh thanks
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