OzVMX Forum

Clubroom => Tech Talk => Topic started by: Mr Aussie on August 14, 2010, 04:32:59 pm

Title: Welding Honda CR80 Cases
Post by: Mr Aussie on August 14, 2010, 04:32:59 pm

Does anyone know what honda made the crankcases out of
Are they a Standard Alloy or a Magnesium Alloy
I have a small crack i want to seal up and dont want to weld it if it is Magnesium

Title: Re: Welding Honda CR80 Cases
Post by: caps 999 on August 14, 2010, 07:29:24 pm

center cases are alloy and most clutch covers on the 80 are alloy to i think its only the aircooled 80 that had a mag clutch cover

Title: Re: Welding Honda CR80 Cases
Post by: GMC on August 14, 2010, 09:41:27 pm

I haven't known of any production center cases that were Mag.

Title: Re: Welding Honda CR80 Cases
Post by: LWC82PE on August 14, 2010, 09:52:12 pm

And if any outer cases are magnesium, they often have it cast in 'magnesium' so you know. CR80 will be Alumimnium for sure.

Title: Re: Welding Honda CR80 Cases
Post by: Mr Aussie on August 15, 2010, 07:12:02 am

Thanks Guys
I will see if i can blow a hole in it with the TIG :o

Title: Re: Welding Honda CR80 Cases
Post by: Slakewell on August 15, 2010, 08:55:17 am

Make sure you put a piece of Stainless behind the hole to help.

Title: Re: Welding Honda CR80 Cases
Post by: caps 999 on August 15, 2010, 09:23:49 am

not all cases are marked magneisum leith the cr480 clutch cover its mag and not marked

Title: Re: Welding Honda CR80 Cases
Post by: Mr Aussie on August 15, 2010, 01:04:20 pm

Quote from: Slakewell on August 15, 2010, 08:55:17 am

Make sure you put a piece of Stainless behind the hole to help.

Yea these cases are quite thin compared to what i have welded in the past

Title: Re: Welding Honda CR80 Cases
Post by: Mr Aussie on August 22, 2010, 06:14:59 pm

Well i got the TIG warmed up today
Prepared the case
Pre-heated it
and welded it
Came up a treat
After grinding it back and finishing it off with a linisher and some emery tape
you would never know
It was a piece of cake