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techtalk:ref:carb01g [2019/09/08 21:25]
hippysmack created
techtalk:ref:carb01g [2024/01/10 18:15] (current)
hippysmack
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 ====== Basic Mikuni VM Information ====== ====== Basic Mikuni VM Information ======
 ===== VM Series ===== ===== VM Series =====
- 
 These are early VM series round slide Mikunis - 34mm, 36mm, or 38mm \\ These are early VM series round slide Mikunis - 34mm, 36mm, or 38mm \\
-Only Mikuni round slide carbs are designated as VM. These are available in different sizes such as VM29, VM34, VM38, VM40 etc. ((piniongear of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1675923&​page=2)) \\+Only Mikuni round slide carbs are designated as VM. These are available in different sizes such as VM29, VM34, VM38, VM40 etc. ((piniongear of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​156562-mikuni-vm38-flooding-engine/​page2?​t=1675923&​page=2)) \\
 HS and HSR carbs are not round slide. The RS is not a round slide. The TM and TMS/TMX are not a round slide. \\ HS and HSR carbs are not round slide. The RS is not a round slide. The TM and TMS/TMX are not a round slide. \\
-This is a very old school set up for a Sportster. Properly set up, this carb gets good mileage and runs well. ((nemosengineer@yahoo.com of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?t=266722)) \\+This is a very old school set up for a Sportster. Properly set up, this carb gets good mileage and runs well. ((nemosengineer@yahoo.com of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​54836-need-help-identifying-mikuni-carb?t=266722)) \\
 **Note Safety Tip**: Cut a piece of bicycle inner tube to stretch over the carb-body and slide-cap to stop the cap from un-screwing. \\ **Note Safety Tip**: Cut a piece of bicycle inner tube to stretch over the carb-body and slide-cap to stop the cap from un-screwing. \\
 This will keep the slide and needle inside the carb on the freeway. \\ This will keep the slide and needle inside the carb on the freeway. \\
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 Sudco will get you close. You can also get a little tool kit they sell with the jet wrench'​s and don't forget the Mikuni pocket tuner. \\ Sudco will get you close. You can also get a little tool kit they sell with the jet wrench'​s and don't forget the Mikuni pocket tuner. \\
  
-Mikuni lists the following Vintage Carb Kits: ((piniongear of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=765846&​page=8)) \\+Mikuni lists the following Vintage Carb Kits: ((piniongear of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page8?​t=765846&​page=8)) \\
 001-200....HDS-101/​38mm.... Sportster/​Shovelhead \\ 001-200....HDS-101/​38mm.... Sportster/​Shovelhead \\
 001-204....HDS-101A/​40mm.... Sportster/​Shovelhead \\ 001-204....HDS-101A/​40mm.... Sportster/​Shovelhead \\
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 Several ways are described in the mounting article above. \\ Several ways are described in the mounting article above. \\
  
- +The correct version of the VM38 for an ironhead Sportster is the VM38-9. ((IronMick of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​169173-mikuni-sticks-out-too-far/​page2?​t=1814834&​page=2)) ((piniongear of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page3?​t=765846&​page=3)) ((piniongear of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​93137-mikuni-vm38-success-story/​page4?​t=765846&​page=4)) \\ 
-The correct version of the VM38 for an ironhead Sportster is the VM38-9. ((IronMick of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1814834&​page=2)) ((piniongear of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=765846&​page=3)) ((piniongear of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=765846&​page=4)) \\ +The VM38-"​9"​ was setup and extensively tested by Jerry Branch for the stock Sportster engine using flow bench tech for the time. ((simeli of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​151596-re-jetting-the-vm38-9-2/​page2?​t=1636803&​page=2)) \\
-The VM38-"​9"​ was setup and extensively tested by Jerry Branch for the stock Sportster engine using flow bench tech for the time. ((simeli of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1636803&​page=2)) \\+
 It is going to be hard to find that you are going to be able to improve on it as supplied. Unless you are running a stroker or highly modified heads and cams. \\ It is going to be hard to find that you are going to be able to improve on it as supplied. Unless you are running a stroker or highly modified heads and cams. \\
 Then the as supplied needles and jets are going to be your best option. Clean it out and replace with the normal "​9"​ needles and jets. \\ Then the as supplied needles and jets are going to be your best option. Clean it out and replace with the normal "​9"​ needles and jets. \\
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 There were a bunch of different VM's (round slide) from 16MM on up to 44MM with the vast majority of them designed for 2 cycle engines. \\ There were a bunch of different VM's (round slide) from 16MM on up to 44MM with the vast majority of them designed for 2 cycle engines. \\
 The VM-38 Standard Right body may be the same for all of the 38MM units. \\ The VM-38 Standard Right body may be the same for all of the 38MM units. \\
-However, all the particulars have to be correct for the VM38-9. Below is the list of all the things that make it a "​9"​. ((simeli of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1675923)) \\+However, all the particulars have to be correct for the VM38-9. Below is the list of all the things that make it a "​9"​. ((simeli of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​156562-mikuni-vm38-flooding-engine?​t=1675923)) \\
   * Bore Size : 38mm   * Bore Size : 38mm
   * Spigot Mount : 43mm   * Spigot Mount : 43mm
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 This particular model is a VM-38mm. It has no numbers on it other than "​Mikuni KOGYO"​. \\ This particular model is a VM-38mm. It has no numbers on it other than "​Mikuni KOGYO"​. \\
-{{:​techtalk:​ref:​carb:​38mm_mikuni_vm_pic_1_by_sturgmachinist.jpg?​direct&​300|}} ((photo by sturgmachinist of the XLFORUM ​http://​xlforum.net/​forums/showpost.php?p=1361935&​postcount=1)) {{:​techtalk:​ref:​carb:​38mm_mikuni_vm_pic_2_by_sturgmachinist.jpg?​direct&​300|}} ((photo by sturgmachinist of the XLFORUM ​http://​xlforum.net/​forums/showpost.php?p=1361935&​postcount=1)) \\+{{:​techtalk:​ref:​carb:​38mm_mikuni_vm_pic_1_by_sturgmachinist.jpg?​direct&​300|}} ((photo by sturgmachinist of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​54836-need-help-identifying-mikuni-carb?​postcount=1#​post1361935)) {{:​techtalk:​ref:​carb:​38mm_mikuni_vm_pic_2_by_sturgmachinist.jpg?​direct&​300|}} ((photo by sturgmachinist of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​54836-need-help-identifying-mikuni-carb?​postcount=1#​post1361935)) \\
  
 Here is another VM-38. \\ Here is another VM-38. \\
-{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_donw.jpg?​direct&​300|}} ((photo by DonW of the XLFORUM ​http://​xlforum.net/​forums/showpost.php?p=3984744&​postcount=1)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_donw.jpg?​direct&​300|}} ((photo by DonW of the XLFORUM ​http://​xlforum.net/​forums/showpost.php?p=3984744&​postcount=1)) \\+{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_donw.jpg?​direct&​300|}} ((photo by DonW of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​136579-mikuni-vm38-branch-manifold-magneto-clearance?​postcount=1#​post3984744)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_donw.jpg?​direct&​300|}} ((photo by DonW of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​136579-mikuni-vm38-branch-manifold-magneto-clearance?​postcount=1#​post3984744)) \\
  
 Mikuni VM-38 with solid mount adapter to run on a shovelhead. \\ Mikuni VM-38 with solid mount adapter to run on a shovelhead. \\
 The adapter is a tight press fit with three set screws. There are threads in the adapter to run the bolts into. \\ The adapter is a tight press fit with three set screws. There are threads in the adapter to run the bolts into. \\
 And there is a groove /O-ring inside the aluminum adapter bore. \\ And there is a groove /O-ring inside the aluminum adapter bore. \\
-{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1814834)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1814834)) {{:​techtalk:​ref:​carb:​vm-38_pic_3_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1814834)) \\+{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​169173-mikuni-sticks-out-too-far?​t=1814834)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​169173-mikuni-sticks-out-too-far?​t=1814834)) {{:​techtalk:​ref:​carb:​vm-38_pic_3_by_claysbury.jpg?​direct&​300|}} ((photo by claysbury of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-era-specific-and-model-specific/​ironhead-sportster-motorcycle-talk-1957-1985/​169173-mikuni-sticks-out-too-far?​t=1814834)) \\
  
 This one is stamped "​X66"​ with the X above the 66 and one of the 6's is sideways. It also has 38F 9 on the back side just below the choke\enricher. \\ This one is stamped "​X66"​ with the X above the 66 and one of the 6's is sideways. It also has 38F 9 on the back side just below the choke\enricher. \\
-{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1151844)) \\+{{:​techtalk:​ref:​carb:​vm-38_pic_1_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​118836-mikuni-vm-my-latest-find?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_2_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​118836-mikuni-vm-my-latest-find?​t=1151844)) \\
  
-{{:​techtalk:​ref:​carb:​vm-38_pic_3_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_4_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_5_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​http://​xlforum.net/​forums/showthread.php?​t=1151844)) \\+{{:​techtalk:​ref:​carb:​vm-38_pic_3_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​118836-mikuni-vm-my-latest-find?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_4_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​118836-mikuni-vm-my-latest-find?​t=1151844)) {{:​techtalk:​ref:​carb:​vm-38_pic_5_by_asasial.jpg?​direct&​300|}} ((photo by asasial of the XLFORUM ​https://www.xlforum.net/​forum/sportster-motorcycle-forum/​sportster-motorcycle-intake-and-exhaust/​sportster-motorcycle-air-intake-carburetor-efi-fuel-and-exhaust/​118836-mikuni-vm-my-latest-find?​t=1151844)) \\
  
 **Fake vs Genuine Mikuni VM**: \\ **Fake vs Genuine Mikuni VM**: \\