August 24, 200917 yr I plan on upgrading the stock 28 mm Bing T84 (the slide is badly worn and I'm told virtually impossible to replace) to a Mikuni 28 mm TM flat slide, VM 28, or VM 26 round slide. Does anyone have experience with any of these carbs on a 199A? Will the 26 mm work well or is it too small? I've been told that the smaller bore might boost low rpm performance. What jetting/needle combination works at 1500 - 2500 feet? Thanks! tightwoods
August 24, 200917 yr I plan on upgrading the stock 28 mm Bing T84 (the slide is badly worn and I'm told virtually impossible to replace) to a Mikuni 28 mm TM flat slide, VM 28, or VM 26 round slide. Does anyone have experience with any of these carbs on a 199A? Will the 26 mm work well or is it too small? I've been told that the smaller bore might boost low rpm performance. What jetting/needle combination works at 1500 - 2500 feet? Thanks!tightwoods are you in the uk?
August 24, 200917 yr I've put a 28mm OKO on my 340 199b and it is straight out of the box, no jetting or needle changes were needed, just a small adjustment on the pilot screw. Runs fine. Doubt very much it is any different from how it would run with the original Bing in as new condition, but that wasn't the purpose of fitting it. Like yours, the Bing was worn out and I needed a replacement carb. The OKO cost
August 24, 200917 yr Author I've put a 28mm OKO on my 340 199b and it is straight out of the box, no jetting or needle changes were needed, just a small adjustment on the pilot screw. Runs fine. Doubt very much it is any different from how it would run with the original Bing in as new condition, but that wasn't the purpose of fitting it. Like yours, the Bing was worn out and I needed a replacement carb. The OKO cost
August 25, 200917 yr The OKO is a copy of the Keihn, as fitted to Shercos etc as an option. I have a 28mm Keihn on my 199A and it works a treat
August 25, 200917 yr No, Pennsylvania, USA Are you concerned about AHRMA regulations? Although I've never seen a bike questions the flat slides may be questioned.
August 26, 200917 yr I plan on upgrading the stock 28 mm Bing T84 (the slide is badly worn and I'm told virtually impossible to replace) to a Mikuni 28 mm TM flat slide, VM 28, or VM 26 round slide. Does anyone have experience with any of these carbs on a 199A? Will the 26 mm work well or is it too small? I've been told that the smaller bore might boost low rpm performance. What jetting/needle combination works at 1500 - 2500 feet? Thanks!tightwoods Don't use the TM flat slide, the VM 28 is your best choice, easy to tune and VERY common on many Jap bikes over the years, easy to get parts for, can't help you with jetting specs
August 27, 200916 yr Author Don't use the TM flat slide, the VM 28 is your best choice, easy to tune and VERY common on many Jap bikes over the years, easy to get parts for, can't help you with jetting specs Thanks!
August 27, 200916 yr Author I'm having trouble finding a VM28 Round Slide. I'm finding 26 and 30 but no 28's. Did Mikuni stop making them?
August 27, 200916 yr Click here http://cgi.ebay.com/28mm-Mikuni-Carburetor...id=p3286.c0.m14 Edited August 27, 200916 yr by hewson
September 6, 200916 yr Over here in Oz, the Mikuni importers tell me that 28mm VM round slide Mikunis are no longer made. Thats why the Keihn is popular, and also because they are a readily available item because of their use on Shercos Unfortunately, the bike wreckers as a source of used quality 28mm Mikunis are a loss. It seems the the only 28mm carbies they have are either off multi engined bikes and/or small 2 stroke screamers. In either event, ALL are worn out and much un-loved
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