Ask an Engineer

[MENTAL490]

I'll give you two modern options to replace the leather.
Sealing washers which are a steel washer with nitrile bonded on. Seal Imports carry a range and probably other places too.
Or make up replacements from urethane. I made up a set for a vintage Triumph rocker box which had pissed oil for ever. Top end is dry but of course the bottom end is still incontinent.

these days theres also a great range of PTFE for almost any job

[MENTAL490]

Niksil and the others are i believe semi ceramic click the arrow Chrome is old school and not so good for 2 smokes.

god i remember my first roadbike kr250, they had the first of the cromefusion barrels that never wear.......yeah right it just falls off and cost a fortune to repair on apprentice wages, at least when i got the kr1 it went likea bat outa hell but a shit stand

[MENTAL490]

Cheers for the responses gentlemen.

Yeh bike will def be stainless, probly just 304.

Wouldnt 316 be a better option if your not turning it (btw I have a small workshop here, if you need anyting machined just holla ya not to far from me.)

[bogan]

I have a friend semi retired here dvk who is great and works for beer lol

Could be a goer, shall I pm you the design files to pass along?

Wouldnt 316 be a better option if your not turning it (btw I have a small workshop here, if you need anyting machined just holla ya not to far from me.)

Yeh good point, it's probably worth the extra cost/hassle of finding 316 parts/fittings in the long run. Got a small workshop over here too, cnc router, lathe, mig/tig; would like to get a mill, but don't really have the shed space.

[MENTAL490]

Could be a goer, shall I pm you the design files to pass along?



Yeh good point, it's probably worth the extra cost/hassle of finding 316 parts/fittings in the long run. Got a small workshop over here too, cnc router, lathe, mig/tig; would like to get a mill, but don't really have the shed space.

i picked up a mill from the welly hospital, hardly used great price, i was so stoked. email the drgs to qld.tsv.game@gmail.com
i find 316 seems to be easier to find that 303 or 304 im not sure about NZ tho

[MENTAL490]

i picked up a mill from the welly hospital, hardly used great price, i was so stoked. email the drgs to qld.tsv.game@gmail.com

if your making your own pipe i have some software that might help, got it when i was gonna join 2cr500 engines and need a tuned but quiet pipe

[Ocean1]

Wouldnt 316 be a better option if your not turning it

Yeh good point, it's probably worth the extra cost/hassle of finding 316 parts/fittings in the long run.

Work hardens. Stick with 304.

[speights_bud]

Work hardens. Stick with 304.

Wouldnt 316 be a better option if your not turning it (btw I have a small workshop here, if you need anyting machined just holla ya not to far from me.)

What does "not turning it" have to do with it? Can turn 316 easily....

I'm with Ocean1 on this, 316 work hardens, then more prone to stress fractures etc. 304 is fine and have never had any issues. Unless you are riding it through brine, tomato juice or blood I dont think you will need the extra corrosion resistance properties either....

[MENTAL490]

Work hardens. Stick with 304.

yes but only under high stress because of the copper added but it wares alot better and as long as you don stress the hell out of its or use it as a running surface its tough and extremely durable where as 304 is a brittle version of 303 and welds tends to stress fracture. I have worked with all 3 alot, the only reason i would use 304 was if it was being machined.

[husaberg]

Work hardens. Stick with 304.

What does "not turning it" have to do with it? Can turn 316 easily....

I'm with Ocean1 on this, 316 work hardens, then more prone to stress fractures etc. 304 is fine and have never had any issues. Unless you are riding it through brine, tomato juice or blood I dont think you will need the extra corrosion resistance properties either....

yes but only under high stress because of the copper added but it wares alot better and as long as you don stress the hell out of its or use it as a running surface its tough and extremely durable where as 304 is a brittle version of 303 and welds tends to stress fracture. I have worked with all 3 alot, the only reason i would use 304 was if it was being machined.

jeeze guys just use Inconel
That way your grandchildren will be able to appreciate your welding technique

ps whats the software Mental?

[MENTAL490]

Was doing my monthly raid on a friends scrap yard and spied what looks like an 80s xv1000 its only good for parts but most of the running gear is there, if no one gets back to me at qld.tsv.game@gmail.com it will go to crusher, suh a waste. so plz let me know if you know someone, it will cost the current scrap steel price per KG which is stuff all.

[MENTAL490]

jeeze guys just use Inconel
That way your grandchildren will be able to appreciate your welding technique

ps whats the software Mental?

i cant honestly remember, its on my lappy in the workshp and to lazy n beered to look now buy ill look tommorrow

[husaberg]

Was doing my monthly raid on a friends scrap yard and spied what looks like an 80s xv1000 its only good for parts but most of the running gear is there, if no one gets back to me at qld.tsv.game@gmail.com it will go to crusher, suh a waste. so plz let me know if you know someone, it will cost the current scrap steel price per KG which is stuff all.

Grumph has always wanted to do one.
He has some aflicition about them?
something about a modern cafe vincent
pretty sure i could get it to the south Island using a kb pass the parcel.

Conveyor Belt specialists in ChCh were one of the places I meant. The other was a little place round the corner from Mace eng who seem to have disappeared post quakes. Local to you i'm sure there's a conveyor belt place who can do vulcanising. Again, check your local yellow pages for rubber products places.
I've only just realised my favourite small outfit referred to above has gone. Bugger it - they did all sorts of little bits of rubber mounts. very useful.

[MENTAL490]

Grumph has always wanted to do one.
He has some aflicition about them?
something about a modern cafe vincent
pretty sure i could get it to the south Island using a kb pass the parcel.

its in really bad shape, ill try get a few picks when im there on monday

[MENTAL490]

Grumph has always wanted to do one.
He has some aflicition about them?
something about a modern cafe vincent
pretty sure i could get it to the south Island using a kb pass the parcel.

i can drop it of to the ferry in welly, im down there at least once a month