OzVMX Forum

Clubroom => General Discussion => Topic started by: Mike52 on September 13, 2015, 03:26:30 pm

Title: Never seen one of these before.
Post by: Mike52 on September 13, 2015, 03:26:30 pm

Just fixing a ER 185 for a mate and noticed this .
(http://i753.photobucket.com/albums/xx172/mike52_photo/Er%20and%20carb/005_zpsexg7swc3.jpg) (http://s753.photobucket.com/user/mike52_photo/media/Er%20and%20carb/005_zpsexg7swc3.jpg.html)
When you think about it it's a very smart idea.
Wonder how one would work on a PE ?

Title: Re: Never seen one of these before.
Post by: John Orchard on September 13, 2015, 05:36:58 pm

I think a few of the mid 80's KX had an oval bore carb.  Back in '85 I oval bored the flatslides on my GSXR750, made a big difference to that.

Title: Re: Never seen one of these before.
Post by: tony27 on September 13, 2015, 07:09:20 pm

Have a couple of Oko D slide carbs for my Sherco that are like that although not to the same effect, up until 1/2 throttle they flow like a 28mm but when wide open are more like a 30mm so you kind of get the best of both worlds

Title: Re: Never seen one of these before.
Post by: Nathan S on September 13, 2015, 07:29:36 pm

Standard on mid-80s KX125s and KDX200s. This looks like the smaller one from an 83-85 KDX (and possibly 82/83 KX125?), due to the choke location.

I hate them with a passion, due to the absence of a idle mixture screw.

Title: Re: Never seen one of these before.
Post by: Mike52 on September 14, 2015, 08:06:20 am

This one has all the standard stuff Nathan including a idle mixture screw.
Does have a weird jet needle setup tho.

Title: Re: Never seen one of these before.
Post by: Lozza on September 14, 2015, 08:13:07 am

Dellorto VHSB still has it

Title: Re: Never seen one of these before.
Post by: LWC82PE on September 14, 2015, 08:33:24 am

TS250 uses that same carby found on the TS185. Just has different jetting.

Title: Re: Never seen one of these before.
Post by: Nathan S on September 14, 2015, 03:25:10 pm

Quote from: Mike52 on September 14, 2015, 08:06:20 am

This one has all the standard stuff Nathan including a idle mixture screw.
Does have a weird jet needle setup tho.

That's interesting to know. I assume the TS ones are smaller again. Any idea of the minor and major dimensions of the throat?

Title: Re: Never seen one of these before.
Post by: matcho mick on September 14, 2015, 07:28:18 pm

small honda singles (XL185's etc) have "hour glass" sectioned venturi', :P

Title: Re: Never seen one of these before.
Post by: LWC82PE on September 14, 2015, 08:23:06 pm

They are classed as a 29mm carby.

found this photo i already had

(https://qiwupa-ch3301.files.1drv.com/y3p2ElkRhXBZ35NGukWMD3zsUY7p839gfyg55TnjRRpbtPEK92-tzwI1rhKiOXj_wP4nX1wAk0NYdub-cnl8aTxlGGX57edaIpdLJeS1PRHnOigfP2vRLFrVwZcnMd2QHDvkKOYgsFV4N9yzB-Yiuj3U3tVasbyR_uUWN7EUuX4MYI/TS250CARBY1.jpg?psid=1)