swdubs.co.uk logo banner

It is currently Wed Jul 26, 2017 4:43 pm

All times are UTC




Post new topic Reply to topic  [ 10 posts ] 
Author Message
 Post subject: Bike carb manifold
PostPosted: Sat Mar 30, 2013 12:27 pm 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Hi Jason.

I've just picked up a set of zx9r bike carbs for my 9a 16v.

Would you guys at JMR be able to make me up a manifold? Would like to support my local(ish) VW specialist if possible.

I also have a couple of questions that you may be able to help me with.

*What size jets should I run? 180's? I have a 4-1 exhaust manifold and KR cams if that makes any diff?
*How do I get a vacuum for the brake servo?

Cheers, Steve

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Mon Apr 01, 2013 11:24 pm 
Offline
Forum Surfer

Joined: Tue Sep 08, 2009 8:29 pm
Posts: 255
Location: Plymouth
Hi Steve

I could have one done yes....would need to know the spacing to get the centres right.

Are you sure about the bike carbs route though Steve?....there are mixed results with them...some have had great results such as Ash on here with his 1300, but I do see a few on the rollers on 16v's...some work ok to be fair, others not so with no real explanation.

Bike carbs are good if your prepared to do a fair bit of the ground work and base setting up, but if they have to come off & on when setting up on the rollers then it can clock the time up. The saving grace is they're generally cheap and have done low mileage on a bike usually. I'd rather you know the possible down sides as well a the up's.

Jet size is going to be dependent on what the engine wants...from memory some use Weber type jets which is easy to sort

I'm speaking to my fabricator tomorrow so I'll ask an idea on price and time for you Steve. I can have a vac take off fitted on the manifold so that's easy enough.

_________________
www.jmrclubsport.co.uk


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Tue Apr 02, 2013 7:39 pm 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Thanks for the reply.

Yes I'm sure about going down the carb route. Been running kjet for years now, and it's time for a change. It's not my daily car, so it doesn't matter too much if there are some teething problems to start with. Plus I can always put the kjet back on if I don't like it. Also I live in the same village as Dave Wills (dinosaur tuning) so I'm sure he'd be able to help me out.

As for jets I might just buy a couple of sizes as they are cheap enough. Browsing the internet on this subject tells me most people run either 170, 175 or 180 main jets.

Good to know you can take a vac line off the manifold. I wasn't sure if it would make a difference to the running of the cylinder it comes off of.

Here's a quick sketch I knocked up on ms paint. Sorry it's not too scale or anything, but hopefully it will make sense. Measurements are taken from the internal diameter of the carbs.

Cheers

Image

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Mon Apr 08, 2013 9:57 am 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Hi, have you had chance to speak to your fabricator yet? Cheers

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Sun Apr 14, 2013 8:30 pm 
Offline
Forum Surfer

Joined: Tue Sep 08, 2009 8:29 pm
Posts: 255
Location: Plymouth
Hi Steve...awaiting an answer....I'll give him a nudge.

_________________
www.jmrclubsport.co.uk


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Mon Apr 15, 2013 12:45 pm 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Ok that would be great. I'm in need of something to tinker with at the weekends :D

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Mon Apr 22, 2013 8:50 am 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Any updates?

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Sun Apr 28, 2013 4:54 pm 
Offline
Forum Surfer

Joined: Tue Sep 08, 2009 8:29 pm
Posts: 255
Location: Plymouth
Managed to pin him down at last...looking at a couple of weeks at the mo...crazy busy...I'm waiting on parts too.

He's got the drawing now so will let me know.

_________________
www.jmrclubsport.co.uk


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Sun Apr 28, 2013 5:08 pm 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
OK thanks. I'll more than likely be after one of your water flanges that allows clearance for the carbs.

Cheers

_________________
Image


Top
 Profile  
 
 Post subject: Re: Bike carb manifold
PostPosted: Mon May 13, 2013 8:06 am 
Offline
Post God
User avatar

Joined: Mon Aug 24, 2009 12:38 pm
Posts: 1564
Location: Nr Exeter
Any progress?

Are you able to quote me on a price? Getting pretty desperate for a manifold now.

Thanks

_________________
Image


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 10 posts ] 

All times are UTC


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  
Powered by phpBB® Forum Software © phpBB Group