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VHM 2 PIECE CYLINDER HEADS
We may sound really biased about VHM products.........that's because we are !!!!
The unique two piece design allows the convenient and cost effective solution to getting the correct compression ratio as well as more efficient cooling.
The CNC machined outer cover takes an insert of your choice, there are a number of different profiles available, for various fuels and performance levels.
VHM are constantly developing new profiles and if you want to develop your own, we can supply you with blanks to machine also
We recommend you also consider the VHM setting tool. All VHM inserts come with a piston protrusion measurement that the head is machined to. Using the tool you simply set the squish by the amount the piston sticks out of the top of the cylinder. This save the hassle of using solder and is really accurate allowing a small amount of adjustment, or ensuring your bang on every time you change your sometimes not so bang on pistons. You also ensure you have constant port timing on your cylinder.
If you run different cylinder heights, VHM will, by special order make inserts to suit.
Everything VHM has made for us has been of the finest quality, accuracy and on time. They are a pleasure to work with and really good people.
 
VHM PISTON HEIGHT TOOL

VHM PISTON HEIGHT TOOL
Essential for measuring the correct piston projection to set the default squish for your VHM heads. We also machine std cylinder heads with piston projection values so you can use this tool to set your squish as quickly and accurately as with the VHM heads.
We use this system for all our engines now, saving time and increasing accuracy and adjustability for your squish clearances, available for RS 125/250 and most moto x ers .
Comes with simple, easy to understand instructions and made to the usual fantastic VHM standards.

CLICK HERE FOR MANUAL FOR PISTON-HEIGHT-MEASUREMENTS AND VOLUME-MEASUREMENTS

Click here to use the Insert calculator.xls

AM34010  VHM PISTON HEIGHT TOOL $149.95    
 
Note: The Volume is calculated on the bike by filling to the top of the spark plug hole. The volume of the spark plug hole is 2.50cc (11.20cc is 8.70cc volume with plug installed)    
AA33035 VHM Head for RS125- These Insets (6mm thick) will also fit the AA33056 head below $225.50
AE32050-067 VHM RS125 Insert  +2.00mm piston height, 10.00cc Volume, .60mm squish - Ian E Special - dome diameter ø42mm
 LOW RAD, SHORT SQUIRTY CIRCUIT AND DYNO LOVERS (THEY SEE GOOD HP WITH THIS) PIKES PEAK AND BUTTON WILLOW FOR EG MR8 /C12 OR SIMILAR		 $89.95
AE32050-136 VHM RS125 Insert  +2.00mm piston height, 10.60cc Volume, .60mm squish - Ian E Special - dome diameter ø42mm $89.95
AE32050-68 VHM RS125 Insert to run MR8 Fuel, insert +2.00mm piston height, 10.2cc .60mm sq - Ian E Special - dome diameter ø42mm - GREAT EVERYWHERE EXCEPT LONG LONG FAST TRACKS LIKE ROAD AMERICA MR8 / C12 - C12 and MR8 run same in compression , only jetting is different $89.95
AE32050-69 VHM RS125 Insert  +2.00mm piston height, 10.40cc Volume, .60mm squish- Ian E Special - dome diameter ø42mm - SOFT , GOOD POWER , GOOD FOR LIGHT RIDERS WHO GET THE BIKE OVER AND THE POWER ON EARLY WHO LIKE REVS MORE EURO STYLE RIDING . GOOD IF THEY HAD A KIT PIPE MR8 / C12   $89.95
AE32050-020 VHM RS125 Insert +2.00mm piston height, 10.40cc Volume, .65mm squish - dome diameter ø38mm $89.95
AE32050-103 VHM RS125 Insert +2.00mm piston height, 10.00cc Volume, .65mm squish $89.95
AE32050-A VHM RS125 Blank Insert $45.00
AE32050-D VHM RS125 Insert for High Octane Unleaded 104+, 11.2cc .65mm - sq HIGH OCTANE (101+ RON) UNLEADED. This UNLEADED IN THE US IS A DIFFICULT ONE .... FIM SPEC UNLEAEDED NEEDS 11.4 AND LOWER ( 11.6 /8 ) BUT A LOT OF US UNLEAEDED RACE GAS HAS RON NUMBERS OF UP TO 107, AND CAN TAKE SIMILAR COMPRESSIONS TO MR8. $54.95
     
AA33056 VHM Head for RS125 A-Kit - 6 Stud - These Insets (6mm thick) will also fit the AA33035 head above $225.50
AE32050-49 RS125 A-kit (6-stud) cylinder head AA33056 (non powervalve)  10.00cc / +2.00 / 0.65 - Ian E specials  $89.95
AE32050-50 RS125 A-kit (6-stud) cylinder head AA33056 (non powervalve)  10.20 / +2.00 / 0.65 - Ian E specials  $89.95
AE32050-112 RS125 A-kit (6-stud) cylinder head AA33056 (non powervalve)9.80 / +2.00 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32050-51 RS125 A-kit (6-stud) cylinder head AA33056 (non powervalve)  10.40cc / +2.00 / 0.65 - Ian E specials  $89.95
AE32050-112 RS125 A-kit (6-stud) cylinder head AA33056 (non powervalve)9.80 / +2.00 / 0.65 - Ian E specials $89.95
AE32052-49 10.40 / -0.45 / 0.65 insert for use with flat top piston (JHA or equal) (Non powervalve kit) - FLAT PISTON $89.95
AE32052-70 10.20 / -0.45 / 0.65 insert for use with flat top piston (JHA or equal) (Non powervalve kit) - FLAT PISTON $89.95
AE32052-72 10.00 / -0.45 / 0.65 insert for use with flat top piston (JHA or equal) (Non powervalve kit) - FLAT PISTON $89.95
     
AA33079 VHM Head for RS125 with Power valve - 6 Stud - Insets (7mm thick) $295.00
AE32067-233 RS125 A-kit (6-stud) cylinder head AA33079 (with powervalve)  10.00cc / +2.00 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32067-234 RS125 A-kit (6-stud) cylinder head AA33079(with powervalve)  10.20 / +2.00 / 0.65  - Ian E Special - dome diameter ø42mm $89.95
AE32067-235 RS125 A-kit (6-stud) cylinderhead AA33079 (with powervalve) 10.40cc / +2.00 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32067-232 RS125 A-kit (6-stud) cylinder head AA33079 (with powervalve)9.80 / +2.00 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32067-235 RS125 A-kit (6-stud) cylinder head AA33079 (with powervalve)  10.40cc / +2.00 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32067-071 RS125 JHA RS-V (6-stud) cylinderhead AA33079 (with powervalve) 11.60cc / -.48 / 075 - FLAT PISTONS $89.95
AE32067-072 RS125 JHA RS-V (6-stud) cylinderhead AA33079 (with powervalve) 11.40cc / -.48 / 075 - FLAT PISTONS $89.95
AE32067-097 RS125 JHA RS-V (6-stud) cylinderhead AA33079 (with powervalve) 11.20cc / -.48 / 075 - FLAT PISTONS $89.95
     
AA33028 VHM Head for Yamaha TZ125 2003->2007 $225.50
AE32036-94 TZ125 2003->2007  10.00cc / 0.00 / 0.78 - Kit Profile $89.95
AE32036-95 TZ125 2003->2007  10.20 / 0.00 / 0.78 - Kit Profile $89.95
AE32036-96 TZ125 2003->2007  10.40cc / 0.00 / 0.78 - Kit Profile $89.95
     
AA33065 VHM Head for Yamaha TZ250 2003-2007 set of 2 $435.00
AE32080-072 VHM Yamaha TZ250 2003 Insert   -0.20mm piston height, 9.80cc Volume, .78mm squish - “ kit “ profile / Raise cylinder 0.2mm $89.95
AE32080-073 VHM Yamaha TZ250 2003 Insert   -0.20mm piston height, 10.00cc Volume, .78mm squish “ kit “  profile  $89.95
AE32080-008 11.20cc / 0.00 / 0.70  (8.70cc) $89.95
AE32080-012 11.10cc / 0.00 / 0.70  (8.60cc) $89.95
AE32080-011 11.00cc / 0.00 / 0.70  (8.50cc) $89.95
AE32080-057 10.90cc / 0.00 / 0.70  (8.40cc) $89.95
AE32080-063 10.80cc / 0.00 / 0.70  (8.30cc) $89.95
AE32080-017 10.60cc / 0.00 / 0.70  (8.10cc) $89.95
AE32080-062 10.40cc / 0.00 / 0.70  (7.90cc) $89.95
AE32080-044 10.30cc / 0.00 / 0.70  (7.80cc) $89.95
AA33028 VHM Head for TZ250  <2002 set of 2 $435.00
AE32036-075  VHM Yamaha TZ250 2003 Insert   +2.00mm piston height, 10.00cc Volume, .60mm squish  $89.95
AE32036-077  VHM Yamaha TZ250 thru 2002, Insert   +2.00mm piston height, 10.20cc Volume, .60mm squish - Piston 56mm $89.95
AA33036 VHM Head for Honda RS250 2001> $420.00
AE32051-129 std RS250`01-> cylinderhead (dome piston)  10.20 / +2.10 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32051-130 std RS250`01-> cylinderhead (dome piston)  10.40 / +2.10 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32051-164 std RS250`01-> cylinderhead (dome piston)  10.00 / +2.10 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32051-107 std RS250`01-> cylinderhead (dome piston)  10.60 / +2.10 / 0.65 - Ian E Special - dome diameter ø42mm $89.95
AE32051-021 VHM RS250 '98-'00 +2.00mm piston height, 10.40cc Volume, .65mm squish $89.95
AE32051-23 std RS250`01-> cylinderhead (dome piston)    10.20 / +2.00 / 065 $89.95
AE32051-074 VHM RS250 '01up Insert  +2.10mm piston height, 10.40cc Volume, .60mm squish $89.95
AE32051-086 VHM RS250 '01up Insert  +2.10mm piston height, 10.80cc Volume, .65mm squish - Ian E Special - dome diameter ø42mm $89.95
AE32051-087 VHM RS250 Insert  +2.0mm piston height,  11.0cc Volume, .65mm $89.95
AE32051-132 VHM RS250 '01up Insert  +2.10mm piston height, 10.20cc Volume, .60mm squish - Ian E Special - dome diameter ø42mm $89.95
AE32051-148  VHM Honda RS250 Insert   +2.00mm piston height, 10.00cc Volume, .60mm squish - Ian E Special - dome diameter ø42mm  $89.95
AE32051-149  VHM Honda RS250 Insert   +2.00mm piston height, 10.20cc Volume, .60mm squish  $89.95
AE32051-158  VHM Honda RS250 Insert "01 up  +2.10mm piston height, 10.60cc Volume, .60mm squish  $89.95
AE32051-D VHM RS250 '01up Insert  +2.10mm piston height, 11.80cc Volume, .66mm squish $89.95
AA33042 Honda 2003 CR250 2002-2004 headset $295.00
AM34010 VHM Piston Height tool - 2046S Mitutoyo Dial Indicator and AN34010 base $149.95
SK33000 VHM Head Sealkit - O'rings $1.70