Jump to content

Sign in to follow this  
bondy

TY 80

Recommended Posts

 

 
 

The carb is a Mikuni VM18, got it from Viperizer racing.  It came in a Sudco box, though -

http://www.viperizerracing.com/Mikuni-VM18-Carburetor-p/su001.001.htm

The manifolds we had made, all that is (somewhere) in the ADV thread I sent.  There was a carb/manifold kit on Fleabay some years ago with  VM20 carb and a custom manifold, but I haven't seen it in years, and a 20 is a bit big for a 72cc Trials bike. 

  • Like 1

Share this post


Link to post
Share on other sites
 
 

We need another run of manifolds since the team has acquired what, something like 5 or 6 more bikes since that first run was made.  I understand that the machinist that made them for us was considering selling and retiring, so I guess we'd better hustle. 

  • Like 1

Share this post


Link to post
Share on other sites
 
 

No, not even close.  I suppose you could make an adapter, but that just forces an 18mm carb to choke through a 16mm opening. 

Share this post


Link to post
Share on other sites
 
 
18 hours ago, bondy said:

There's is another mikuni carb vm20 comes with a Adaptor kit to fit the TY 80

I saw a kit like that some years ago on Fleabay.  Boxy-looking manifold and what was advertised as a 20mm Mikuni.  Last I checked, it was still Out of Stock.

If you find one, make sure that the carb is a gennie Mikuni, not a cheap Chinese copy.  Those tend to be of dubious quality, leading to tuning frustrations.  Taiwan Mikuni copies have a pretty good reputation, though.  

We always wondered how the 20mm would work on a TY80.  That's a huge step up from the OE 16mm TK. 

Share this post


Link to post
Share on other sites
 
 

There very well may be a 16mm roundslide carb that will swap on, I never really researched it.  We went with the 18mm Mikuni because we were already doing minor port and head mods at the time.  The engines ran well with stock TKs (if we could find some that didn't have worn slides), but they woke up pretty well with the 18mm Mikunis.  If you do decide to go with the 20mm kit, I would humbly suggest you put it on an engine with a fresh top-end to give it a chance to ingest what a 20mm carb can deliver.  B)

  • Like 1

Share this post


Link to post
Share on other sites
 
 

I haven't heard back yet to see if our machinist is still around, or in retirement (again) making Porsche parts.  I'll let you know.  B)  

  • Like 1

Share this post


Link to post
Share on other sites
 
 

Join the conversation

You can post now and register later. If you have an account, sign in now to post with your account.

Guest
Reply to this topic...

×   Pasted as rich text.   Paste as plain text instead

  Only 75 emoji are allowed.

×   Your link has been automatically embedded.   Display as a link instead

×   Your previous content has been restored.   Clear editor

×   You cannot paste images directly. Upload or insert images from URL.

Loading...
Sign in to follow this  

×
×
  • Create New...