oldskoolvws Posted October 27, 2012 Report Share Posted October 27, 2012 Anyone successfully running center pull linkage on a Mikuni manifold without cutting the crossbar? Don't want to cut out the Mikuni logo. Pics please? 1 Quote Link to comment
ggzilla Posted October 27, 2012 Report Share Posted October 27, 2012 My dual-mikuni setup has center pull linkage. But I don't know if it is a Mikuni-brand manifold. Quote Link to comment
banzai510(hainz) Posted October 27, 2012 Report Share Posted October 27, 2012 Im using the bar set up as GGZilla on a Mikuni manifold. I use a cable hooked up to a arm that has a cable end hook up. I made a brack to fit on top of the barb to fit he cable thru it. mine cable comes from the driver side Quote Link to comment
68Datsun510 Posted October 27, 2012 Report Share Posted October 27, 2012 Hainz, the average cost for a mikuni cable linkage is over 160 bucks, could you post a pic of your setup? Not tryin to threadjack, but im trying to save a little money here and there collecting bits for my 44s. Thanks! Quote Link to comment
banzai510(hainz) Posted October 27, 2012 Report Share Posted October 27, 2012 pm me with your email. I really need to get this on my camera a close up I also have a cannon intake with a center pull set up(TroyErmish 18RG set up) ,But dont want to move the center parts as the otherend of the carbs dont look like the can be removed to make it a bar set up,otherwise ill have to cut the center as oldskool to get full throttle Quote Link to comment
oldskoolvws Posted October 27, 2012 Author Report Share Posted October 27, 2012 Thread jacking is authorized. I can never seem to find enough information on Mikuni's. I have more sets of dual carbs than I know what to do with and it's interesting to see the variations that people come up with to make work. I may try the ggzilla method above. I don't have the heart to cut the Mikuni Manifold. I'll post some pics of the manifold soon. Quote Link to comment
Stoffregen Motorsports Posted October 28, 2012 Report Share Posted October 28, 2012 The only way to get the linkage to clear the manifold is to use the rubber Nismo carb isolators. They are thick enough to clear, but you may want to machine the manifold 1/1/6" or so to add peace of mind. There are many different ways to do center pull, and some of them use different length arms. Which setup do you have? Here's a pic of the isolator I'm talking about. It's actually a Roadster isolator, but it's close enough. Quote Link to comment
Stoffregen Motorsports Posted October 28, 2012 Report Share Posted October 28, 2012 My dual-mikuni setup has center pull linkage. But I don't know if it is a Mikuni-brand manifold. Maybe you said in that other thread, but I was wondering why you don't run carb isolators. Is it a space issue? Quote Link to comment
ggzilla Posted October 29, 2012 Report Share Posted October 29, 2012 Well it orginally had the Nismo isolators like your photo. When the carbs were not running right, I was concerned about some cracks in the rubber, so I took them off. While it didn't fix the problem, it seems to run fine w/o the isolators. The problem turned out to be the DCOE air cleaners. I had to drill (another) vent hole in the base plates as the DCOE base plates covered the Mikuni/Solex bowl vents. I did't have room in the small 1200 to fit taller air cleaners. It came with no air filter, but velocity stacks only. Quote Link to comment
Stoffregen Motorsports Posted October 29, 2012 Report Share Posted October 29, 2012 Well it orginally had the Nismo isolators like your photo. When the carbs were not running right, I was concerned about some cracks in the rubber, so I took them off. While it didn't fix the problem, it seems to run fine w/o the isolators. The problem turned out to be the DCOE air cleaners. I had to drill (another) vent hole in the base plates as the DCOE base plates covered the Mikuni/Solex bowl vents. I did't have room in the small 1200 to fit taller air cleaners. It came with no air filter, but velocity stacks only. Yeah, that vent hole has caused many people the same problem. If it runs fine without any isolators, don't mess with it. I wonder if the fact that it's a small displacement motor, with less probable vibrations, has anything to do with it? Quote Link to comment
ggzilla Posted October 29, 2012 Report Share Posted October 29, 2012 Maybe. A-series engines are very smooth (for a four-banger). Quote Link to comment
68Datsun510 Posted October 29, 2012 Report Share Posted October 29, 2012 there's no way in hell I get away with no isolators on mine... Lumpy cam =shaky idle Quote Link to comment
Stoffregen Motorsports Posted October 29, 2012 Report Share Posted October 29, 2012 there's no way in hell I get away with no isolators on mine... Lumpy cam =shaky idle Believe it or not Cody, your idle will improve with the dual carbs. I would still get the isolators though...and a center pull...and a backing plate...and a heat shield...and a good fuel pressure regulator... Quote Link to comment
68Datsun510 Posted October 30, 2012 Report Share Posted October 30, 2012 I had planned on all that, cant afford the best of the best things, but...backing plate? I assume that is the filter backing plate to tie the carbs together? Quote Link to comment
Stoffregen Motorsports Posted October 30, 2012 Report Share Posted October 30, 2012 I had planned on all that, cant afford the best of the best things, but...backing plate? I assume that is the filter backing plate to tie the carbs together? Correct. Filter would normally be optional, but knowing where you live, I might recommend one. The single backing plate ties the carbs together which is vital because the center pull linkage can affect carb balance when you romp on it. The backing plate keeps this from happening. 1 Quote Link to comment
68Datsun510 Posted October 30, 2012 Report Share Posted October 30, 2012 Makes sense to me. 1 Quote Link to comment
spec-bre Posted October 30, 2012 Report Share Posted October 30, 2012 Not sure if this helps at all. Mikuni Carbs and intake.. Quote Link to comment
Silky_Johnson Posted October 30, 2012 Report Share Posted October 30, 2012 I think this is what oldskoolvws was originally referring to: But yeah, it looks like that setup would hit the Mikuni manifold... It looks like Pierce Manifolds has some DCOE stuff, but who knows if it's compatible with Mikunis? http://www.piercemanifolds.com/product_p/pm3718.htm And it would appear that Troy Ermish used to have Mikuni specific center pull linkage, but not anymore? http://www.ermish-racing.com/onlinestore.cfm I like the idea of the center pull linkage, as it looks like there is less room for error. I have the same crossbar setup as Hainz and ggzilla, but now the plastic bushings on the rod are wearing out. That = small amount of play between throttle levels. Quote Link to comment
Stoffregen Motorsports Posted October 31, 2012 Report Share Posted October 31, 2012 We used to use the Toyota 2TC center pull kit from Mikuni. Nismo had their own waaaaay back in the day, but good luck finding it. The DCOE stuff won't work, at least without totally reinventing it. Try Rebello. http://www.rebelloracing.com/ Quote Link to comment
Stoffregen Motorsports Posted October 31, 2012 Report Share Posted October 31, 2012 Not sure if this helps at all. Mikuni Carbs and intake.. The setup pictured is not a center pull linkage. And if you're not careful to keep the carbs in perfect synch, you can bend throttle shafts with this style linkage. Quote Link to comment
oldskoolvws Posted October 31, 2012 Author Report Share Posted October 31, 2012 Silky is correct. This is the center-pull linkage style I was referring to. The upper linkage piece in this Troy Ermish photo shows exactly the center-pull in discussion. Quote Link to comment
Burabuda Posted October 31, 2012 Report Share Posted October 31, 2012 ddgonzal's is not centerpull either this is centerpull: (nissan comp?) more centerpull : (ermish? setup) Quote Link to comment
oldskoolvws Posted October 31, 2012 Author Report Share Posted October 31, 2012 This is the problem with the Mikuni manifold. Where the throttle cable needs to come up, the Mikuni cross tube is in the way. Quote Link to comment
Stoffregen Motorsports Posted October 31, 2012 Report Share Posted October 31, 2012 ddgonzal's is not centerpull either this is centerpull: (nissan comp?) Yes. That's the Nissan Comp setup that you can't get anymore. Really high quality stuff. Quote Link to comment
Stoffregen Motorsports Posted October 31, 2012 Report Share Posted October 31, 2012 This is the problem with the Mikuni manifold. Where the throttle cable needs to come up, the Mikuni cross tube is in the way. That's why using the soft carb isolators helps. So they're $35 each, and you've got some time in setting them up. At least you don't have to cut your manifold in half. Quote Link to comment
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