Mikunis with a std Airbox
- Thread starter Vince
- Start date
It's very doable, Vince.
First, I had stock intake stubs and rubber connectors with stock intake bellows on the carb mouths. Later with Mikuni intake stubs, which are a bit shorter and offer more room to the air box. About 10-12mm removed from the rear edge of the airbox, no filter. No difference in performance between the 2 set-ups. Sorry, no pics of the air box.
Bellows can be stretched over the carb mouths when warmed in hot water. After a couple of months, they're actually quite easy to remove and reinstall. Do need to have the later, thick rubber ones though. The earlier type are quite thin and plastic-like, they tear easily. Way past their best-by date anyway...
piet
First, I had stock intake stubs and rubber connectors with stock intake bellows on the carb mouths. Later with Mikuni intake stubs, which are a bit shorter and offer more room to the air box. About 10-12mm removed from the rear edge of the airbox, no filter. No difference in performance between the 2 set-ups. Sorry, no pics of the air box.
Bellows can be stretched over the carb mouths when warmed in hot water. After a couple of months, they're actually quite easy to remove and reinstall. Do need to have the later, thick rubber ones though. The earlier type are quite thin and plastic-like, they tear easily. Way past their best-by date anyway...
piet
Attachments
Hi Piet, so that's the back trimmed 12mm off to reduce the box thickness, does that allow the back of the box to still fit. Still keen to run an air filter, was thinking about dropping the filter to the bottom of the box like it was talked about years ago to get as much still air capacity as possible. Finding a filter that will allow a cut and not frizz to bits will need to be done.
tstrainer
Senior member
- Location
- Honiton, Devon
GregT
Hero member
- Location
- Christchurch NZ
Info that might help someone. Early GSXR750 carb to airbox rubbers fit the RS's. The center two are straight and the outers curved. They have a double lip part way along which the airbox front fits into. These come from the "outside the US" version with the early flatslide carbs - non CV.
I've used them on RS's in several applications - usually with hand made airboxes. They're a good bellmouth shape.
I've used them on RS's in several applications - usually with hand made airboxes. They're a good bellmouth shape.
piranha-bro2
Hero member
- Location
- Melbourne
Good info, Greg. May help me with my Keihin FCR fit to my SFs. very keen to retain my airbox (but with large pod filters custom fitted inside.
GregT
Hero member
- Location
- Christchurch NZ
Piranha Brother 2 said:
In my experience, you're better to run a still air box with a single big K&N filter on the back.
Jo
Hero member
- Location
- Cologne, NRW Germany
Hello Vince,
here a picture showing the original bellows stretched over Mikunis:
This was discussed here http://www.laverdaforum.com/forum/index.php/topic,98038.75.html
(as I?m planning the same ?)
8)
Cheers
Jo
here a picture showing the original bellows stretched over Mikunis:
This was discussed here http://www.laverdaforum.com/forum/index.php/topic,98038.75.html
(as I?m planning the same ?)
8)
Cheers
Jo
piranha-bro2
Hero member
- Location
- Melbourne
Yes, good point, Greg. It's not a true still air box (which is something I would indeed like). I should have said, 'protective airbox'. With sidecovers and airbox in place, the SF does have a certain still air quality to it though.GregT said:
chrisk
Hero member
- Location
- Brisbane, Australia
Jo said:
That is the oddest place I have seen an earth lead fixed.
chrisk
Hero member
- Location
- Brisbane, Australia
Vince said:
I was talking about the one mounted on the sprocket cover
Guys very nice of your input however you need to understand that Vince's set up is way different to yours The only common denominator Mikuni RS36's, now his set up has been developed by very clever people with a lot of R&D along with which has been proven on the race track.
Now I wont get into an argument of which set up is OK however it has been found through a lot of testing, on the road, dyno and track level that the Mukini's mounted at the angle of or stock carbs is not ideal and they were not designed to be at that plane.
If you want to keep the standard angles.. then FCR down drafts are the way to go as they will run quite Ok at this angle, however have your money ready as they will cost a lot more than Mikuni's, speaking of which FCR's have quite a few options for the air intake flanges so its quite possible and way more easy to use the standard Laverda intake rubbers. I machined about an 1/8 of inch dia off an alloy set of flanges and worked like a gem.
Back to topic Greg yes Suzuki rubbers are an option also as I have already suggested to Vince are 94-97 Trumpy rubbers which I think would be better. However he still needs to come up with a box set up and hence why he is looking for a damaged one as I have told him there is absolutely no way am going to alloy him to cut up a perfectly good standard one.
Also suggested that the Pods are tried and tested... once he goes to the air box then we are going to have to play with jetting and carb set up so hope his pockets are deep... remember the last time he took it to some dyno genius it took us a while to reinvent the thing back to what works
then again what would the bloke who builds the kit specially for Lav's know 
FCR's with standard airbox, could have bought two sets of Mikuni's ready to go for the cost let alone the hours spent sorting
Now I wont get into an argument of which set up is OK however it has been found through a lot of testing, on the road, dyno and track level that the Mukini's mounted at the angle of or stock carbs is not ideal and they were not designed to be at that plane.
If you want to keep the standard angles.. then FCR down drafts are the way to go as they will run quite Ok at this angle, however have your money ready as they will cost a lot more than Mikuni's, speaking of which FCR's have quite a few options for the air intake flanges so its quite possible and way more easy to use the standard Laverda intake rubbers. I machined about an 1/8 of inch dia off an alloy set of flanges and worked like a gem.
Back to topic Greg yes Suzuki rubbers are an option also as I have already suggested to Vince are 94-97 Trumpy rubbers which I think would be better. However he still needs to come up with a box set up and hence why he is looking for a damaged one as I have told him there is absolutely no way am going to alloy him to cut up a perfectly good standard one.
Also suggested that the Pods are tried and tested... once he goes to the air box then we are going to have to play with jetting and carb set up so hope his pockets are deep... remember the last time he took it to some dyno genius it took us a while to reinvent the thing back to what works
then again what would the bloke who builds the kit specially for Lav's know
FCR's with standard airbox, could have bought two sets of Mikuni's ready to go for the cost let alone the hours spent sorting
Yogi
Hero member
- Location
- Bellingen NSW Australia
Vince,
As you know, I decided to switch over to the Mikuni RS36's whilst having some other work undertaken by Redax a few years ago. Based on my trust in their knowledge of all things triple and around the fitting the Mikunis to our old clunkers, along with my experience of their quality of workmanship and advice over the years, I asked what their suggestions would be with regard to fitting these to my 1200. That is how I ended up with some of Redax's inlet stubs, the specified pod filters and the replacement throttle (along with a very slightly raised petrol tank to clear the top of the Mikunis.
I have never had an issue since following their advice and am stoked with the conversion.
Is there any way that I could convince you to go the same route as trodden by myself and many others - it really was a pain-free exercise?
I keep on thinking of that old advertisement line - when you are on a good thing, stick to it. Oh, and that annoying bloody line from meerkat insurance ad - Simples!
You should come over for brunch one day and promise me that you will give this airbox business away...
Yogi
As you know, I decided to switch over to the Mikuni RS36's whilst having some other work undertaken by Redax a few years ago. Based on my trust in their knowledge of all things triple and around the fitting the Mikunis to our old clunkers, along with my experience of their quality of workmanship and advice over the years, I asked what their suggestions would be with regard to fitting these to my 1200. That is how I ended up with some of Redax's inlet stubs, the specified pod filters and the replacement throttle (along with a very slightly raised petrol tank to clear the top of the Mikunis.
I have never had an issue since following their advice and am stoked with the conversion.
Is there any way that I could convince you to go the same route as trodden by myself and many others - it really was a pain-free exercise?
I keep on thinking of that old advertisement line - when you are on a good thing, stick to it. Oh, and that annoying bloody line from meerkat insurance ad - Simples!
You should come over for brunch one day and promise me that you will give this airbox business away...
Yogi