TM400 project

[frostype400]

Well I finally got motivated to do my tm400 and I have stripped the wheels and the motor so far I couldn't beileve someone had run it with a bearing missing on the kickstart idler gear.

Also who the hell puts burred screws back in cases I hate that. I was planning to get some one to rebuild the motor but I figure if I do it all bar the crank I will know exaclty what I have got.

I also would like to know what is the best way to get the rims spot on they are the akront mudcatchers but do I get them bead or sodablasted or vapour blasted to remove any corrosion on them is there anyone that would do that all in one hit, thanks Michael.

[frostype400]

Also I was lucky enough to get the the bike with some parts already done, I would like to thank Ray for selling me the bike if he checks on here.



I would like a new seatcover I can only find 73 onwars though.

[LWC82PE]

Are the rims bare or annodized? (test for conductivity with a buzzer on multimeter)  I would think they are bare. I would just blast the inside to remove corrosion and polish the outside if they are bare. Blasting the outside would just make more effort required for polishing. How bad are they? can you post a photo? Another option is just cleaning them first in chemical alloy cleaner. Eg Septone Ali-brite is really good. That way you can do the whole rim and it will remove the corrosion and not roughen up the outside surface. You would need a contaner big enough and shallow enough to stand the rim in and then just rotate it around every so often. You will see it foaming away cleaning the alloy. That would be the best way unless you want to buy 20 liters of the stuff and lay the rim down in a bigger dish and do it all at once. After that you can then polish up the outside of the rims.

[Viper79]

Frosty, the mudcatchers are a dream to work with, because they are not anodised you are playing with raw alloy and you can do all sorts with them. I had a corroded set on my MX360, I rubbed them back with 800 and then 1200 wet and dry sand paper until I had a nice clean surface and then polished them with Autosol cream. If you have nicks and marks on the outer edges don't be afraid to clean them up with a bit of course sand paper or even a fine file finishing off with 800 or 1200 followed by Autosol.





 

[oldfart]

The alloy cleaner I find works the best for me is   All-Brite heavy 7664-39-3
Active ingredient's are Sulfuric acid along with Hydroflouric acid ..... be warned this shit needs respect  - PPE gear must be warn   ie gloves @ glasses
Citric acid is my next favourite...... alot more user friendly   

[firko]

Michael....I do all of the above steps on DID,Takasago, Akront and Borrani mudcatcher rims. I think TM Suzuki's have DID rims and Yamaha's Takasago which are a softer alloy than Akronts or Borranis and therefore polish up even shinier than the Euro rims. A clean up with '800 grit paper, then 1200 to get them pretty smooth. I then put in some serious elbow action using Auto-Sol or Mothers Mag Wheel polish. When they're as shiny as I can get 'em I then do it all over again using Brite-Shine cotton wool style polish which'll bring them up almost as shiny as chrome. The process works on badly corroded nickel plated frames as well...just leave out the 800 grit paper, substituting a chuck mounted stainless steel brush and then the Auto Sol...Brite-Shine routine.

[frostype400]

Thanks for all the advice guys I will give that a crack this weekend.

I found that the kickstart stopper is broken as well some one has been having a go at some things inside the gearbox I found metal in the bottom more than what should have been there from what I can see it appears it has been rebuilt at some stage but the kick start idler gear was just on the shaft it didn't have a needle rolling bearing so it cut in to the countershaft bearing retainer.

[Rossvickicampbell]

have to add - be very very  careful with Hydrofluoric acid - this is the one that likes calcium and doesn't like to stop when it gets going!

[Marc.com]

Paint looks good Bro, I was going to go red on my 73 .... just for a little variety in the shed. Will look mint when it is finished.

[oldfart]

Ross, yes you are right there.... only need to soak it for 5 minutes max as it rips thru all dirt and grime.
Pickling paste for S/S has the same ingredients,  put a around 3 desert spoons to 2 litres of water and mix together.
HF has a ph of around 2.1
. 
 

[frostype400]

Mucked around with the rims today and got them not to bad the front is good but the rear needs more work might need to sand it with some course sand paper.

The acid worked well too stripped all the corrosion etc easily.