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Homemade plastic skid plate?

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I’ve got a 2001 yz125 and I need to buy a skidplate soon I’ve been using aluminum and I’ve liked it but I would like to try plastic, but I can’t find any plastic skid plates anywhere for my bike because it’s so old, I’ve got a bunch of fenders at my disposal if anyone thinks those would be strong enough after melting/bending them into shape.

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i don't think you are going to have much luck with that and fender plastic is going to provide next to zero protection.

If you know anyone who works with welding plastic and has access to polypropylene stock they could fab something up pretty quick with a rough template and it would be very durable.

Also, you could probably buy a plastic plate for a newer bike, then just get the mounting brackets for the steel frame and be good to go.  Might have to drill a hole or 2 but should be similar enough to mount up no problem

Edited by subxero
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https://www.hyderacing.com/index.htm

Hyde Racing has them. I could not find plastic ones for the older YZ's and then had seen YZDoc mentioned these. He has pictures in his build threads and Hyde's website has pictures. Their website seems horribly slow any time I have been on it. I have been wanting to buy a couple to try them out but the shipping for just two seems too high. If I buy all four I need the shipping is better but not sure if I want to tie that much up on skidplates that I may not like?

I have thought about trying what subxero mentioned above about using a newer model skidplate. I mostly was looking at the YZ250 though and the frame geometry is supposedly the same between the steel and aluminum frames so I assumed it would work decent other than the steel frame it round tube and aluminum is square.

As far as fabbing up your own it is very doable. I made a couple for my 4 stroke 250's I had out of heavy cutting board material. Do a quick google search and you will see some that have done this. These worked well for me but I did crack one on a pretty hard hit on a big rock. It remained usuable but just with a crack. It will be difficult to have one be as formed around the cases as a purchased product.

If you are just wanting the plastic to slide over rocks/ logs easier you could also add two or three strips of plastic to the bottom of the aluminum plate you have.

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https://www.hyderacing.com/index.htm

Hyde Racing has them. I could not find plastic ones for the older YZ's and then had seen YZDoc mentioned these. He has pictures in his build threads and Hyde's website has pictures. Their website seems horribly slow any time I have been on it. I have been wanting to buy a couple to try them out but the shipping for just two seems too high. If I buy all four I need the shipping is better but not sure if I want to tie that much up on skidplates that I may not like?

I have thought about trying what subxero mentioned above about using a newer model skidplate. I mostly was looking at the YZ250 though and the frame geometry is supposedly the same between the steel and aluminum frames so I assumed it would work decent other than the steel frame it round tube and aluminum is square.

As far as fabbing up your own it is very doable. I made a couple for my 4 stroke 250's I had out of heavy cutting board material. Do a quick google search and you will see some that have done this. These worked well for me but I did crack one on a pretty hard hit on a big rock. It remained usuable but just with a crack. It will be difficult to have one be as formed around the cases as a purchased product.

If you are just wanting the plastic to slide over rocks/ logs easier you could also add two or three strips of plastic to the bottom of the aluminum plate you have.

I may just try to put some plastic on my aluminum unless I can actually get Hyde racing to load up it’s taking Forever to load. I’m trying to check the price and it won’t load in when I select yz125.

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7 hours ago, Yzmaster said:

I may just try to put some plastic on my aluminum unless I can actually get Hyde racing to load up it’s taking Forever to load. I’m trying to check the price and it won’t load in when I select yz125.

Their website seems worse today than normal but it is always super slow. You may be best to just call them and get some pricing and shipping costs. If you do a google search you will find plenty of pictures of the steel frame 125's.

Check out this thread of @2 STROKE YZ DOC if you have not already. Page 37 post on May 2nd and page 38 post on May 4th have some good pictures of the skidplate. I need to get some of these oredered at some point.

 

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9 hours ago, Yzmaster said:

I may just try to put some plastic on my aluminum unless I can actually get Hyde racing to load up it’s taking Forever to load. I’m trying to check the price and it won’t load in when I select yz125.

Call them is better. 101.00 w shipping.

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I built a skidplate last year from 8mm PE. (For a 250, though)

IMG_20170226_182238578.jpg

IMG_20170226_200602553.jpg

IMG_20170226_200631214.jpg

Edited by yo_eddie
It is 8, not 6mm PE...
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I built a skidplate last year from 6mm PE. (For a 250, though)

IMG_20170226_182238578.jpg.af65d2031d8e3d077e9bbcdb8a69f2f3.jpg

IMG_20170226_200602553.jpg.7c35930be3df7b5f1f33dcfdcdd939ff.jpg

IMG_20170226_200631214.jpg.c3f3d41a2842f56ee04f92c085abaa36.jpg

Did you melt it into shape? And what did you use as the mounting hardware.

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34 minutes ago, Yzmaster said:


Did you buy a sheet and melt it into shape?

First made a template from cardboard, then cut the shape out of the PE sheet. Using a heatgun I bent and squeezed the PE into shape, then welded the gaps, again using the heatgun. 

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Call them is better. 101.00 w shipping.

Would one of the newer alum. Frame YZ250 skid plates fit with slight modifications? I’m really liking this cycra full coverage IMG_2298.thumb.JPG.48d0af0d849b2bd7fab1587e724c7a93.JPG if not I’m trying to think of ways I could add a piece of plastic on the bottom of alum. Skidplates to help it slide.

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36 minutes ago, Yzmaster said:

if not I’m trying to think of ways I could add a piece of plastic on the bottom of alum. Skidplates to help it slide.

Just had a look, I made mine from 8mm PE.

PE is much more durable and tougher than those injection molded plastic skidplates. Actually you don't have to weld, just cut out the shape and bend it into shape. 

You can also cut out a tail to the plate, so that the linkage is covered, too. 

Edited by yo_eddie

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38 minutes ago, Yzmaster said:

Would one of the newer alum. Frame YZ250 skid plates fit with slight modifications? I’m really liking this cycra full coverage IMG_2298.thumb.JPG.48d0af0d849b2bd7fab1587e724c7a93.JPG if not I’m trying to think of ways I could add a piece of plastic on the bottom of alum. Skidplates to help it slide.

Don't think so. 

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Just had a look, I made mine from 8mm PE.

PE is much more durable and tougher than those injection molded plastic skidplates. Actually you don't have to weld, just cut out the shape and bend it into shape. 

You can also cut out a tail to the plate, so that the linkage is covered, too. 

I might try to make one like yours. Where did you buy the polyethylene? What did you use to mount it as well?

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51 minutes ago, Yzmaster said:

I might try to make one like yours. Where did you buy the polyethylene? What did you use to mount it as well?

Bought it via eBay. The mounts are two Z shaped pieces of 4mm x 20mm aluminium, covered with pieces from a bike tube. The Zs are fastened with countersunk screws to the plate and the ends grab over the frame strut underneath the motor. 

In the front I just put a piece 6mm x 20mm with two M8 threads behind the frame and screwed it on. 

IMG_20181016_203750951.jpg

IMG_20181016_203740541.jpg

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On ‎10‎/‎15‎/‎2018 at 12:04 PM, Yzmaster said:

I may just try to put some plastic on my aluminum unless I can actually get Hyde racing to load up it’s taking Forever to load. I’m trying to check the price and it won’t load in when I select yz125.

Looks like their website is running better as of tonight and updated a bit. It also looks like the prices went up slightly. Here is a screen shot of the steel frame (up to 2004) YZ125 skidplate with shipping to Texas.

image.png.5858c533b9964f3f8883f16845742371.png

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15 hours ago, yo_eddie said:

I built a skidplate last year from 8mm PE. (For a 250, though)

Interesting. This is just with a heat gun? Might have to give it a go.

So you just cut off some section for the (front) sides, then bend the front up, then bend the sides up, then bend the front-side in, then you melted it back together?

 

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1 hour ago, eXc said:

Interesting. This is just with a heat gun? Might have to give it a go.

So you just cut off some section for the (front) sides, then bend the front up, then bend the sides up, then bend the front-side in, then you melted it back together?

 

Exactly. Bent the sides up, too. Indeed it took me some hours and several iterations, but was fun, too. I do not have a complete "making of", but here are some pictures of the progress. For welding there are adapters for heatguns available. They allow simultaneously heating the PE at the welding spot and feeding the welding stick.

IMG_20170226_170354777.jpg.c8d74448e1efc782fd8e35552a5728ae.jpg

IMG_20170226_170507188.thumb.jpg.06a25b439ce1202911a235f8ac2b019a.jpg

Several iterations of cutting and bending the sheet...

IMG_20170226_173649346.thumb.jpg.10e03afe61b116a199ec7f372516595a.jpg

Here you can see the welding sticks. After welding, I cut off excessive material. Until now, everything holds up well.

IMG_20170226_181015838.jpg.f560a535795b1a3cf50444e8118b994f.jpg

Needs some shaping...

IMG_20170226_181614298.jpg.35b86b0c81e3a50763eff89038c921e8.jpg

Pressure and heat help.

IMG_20170226_181737446.jpg.28be13364749d39b469d710e32664efe.jpg

IMG_20170226_182238578.jpg.8626301cec160266f8357c70bbffc110.jpg

IMG_20170226_200602553.jpg.616de34e721e584e0a8f53fdcd019a00.jpg

I I knew I would be riding almost exclusively tracks today, I would have built it not that complicated though...

Edited by yo_eddie
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Cool thanks. I'll add it to my list of things if I ever get time :)

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