Apr 10, 2012. All timing is quoted at .040" lift at the valve with zero checking
clearance unless otherwise stated. SUZUKI DR-500 (1982—1984). Hardfaced
cam ...
www.megacyclecams.com 90 MITCHELL BOULEVARD SAN RAFAEL, CALIFORNIA 94903 415 472-3195 FAX 415 472-1497
SUZUKI DR-500 (1982—1984) Hardfaced cam, on customer core. Rocker arms, weld and grind, cost each. 387-20 387-x5 Stock
.394" .387" .429" .411" .326" .329"
245° 253° 272° 274° 232° 234°
108.5° 109.5° 105° 105° 109.5° 110.5°
Use modified piston and springs. Off-road, wide power band. Race profile. TT, moto-X, mid-range and top-end power. Must use modified pistons and kit #403-S. Stock DR-500 for your reference.
SUZUKI DR/SP-600 (1985—1986)
14 btc/51 abc 56 bbc/17 atc 31 btc/61 abc 62 bbc/32 atc 6.5 btc/45.5 abc 47.5 bbc/6.5 atc
.005" .007" .005" .007"
DR-650 (1990—1995) Hardfaced cam, on customer core. #418-S R/D valve spring kit with titanium tops. Rocker arms weld and grind, cost each
CAM NUMBER
VALVE LIFT
DURATION AT .040"
LOBE CENTERS
394-00
.400" .390"
245° 253°
106.5° 109.5°
394-x2
.400" .385" .364" .367"
268° 270° 237° 241°
103° 105° 109° 111°
Stock
DESCRIPTION AND APPLICATION
Must use spring kit. Should work with stock piston, must check. All around off-road power. Great mid-range, added top-end pull. Race profile. Use spring kit and modified piston. Fast TT, moto-X. TDC lift IN = .134", EX = .125" Stock DR-600 for your reference.
INTAKE OPEN/CLOSE RUNNING EXHAUST OPEN/CLOSE CLEARANCE
16 btc/49 abc 56 bbc/17 atc
.005" .007"
31 btc/57 abc 60 bbc/30 atc 9.5 btc/47.5 abc 51.5 bbc/9.5 atc
.005" .007"
SUZUKI DR-750 SINGLE (1989—1990) European Model Hardfaced cam, on customer core. #422-S R/D valve spring kit with titanium tops. Rocker arms cost each to weld and grind. CAM NUMBER
VALVE LIFT
DURATION AT .040"
LOBE CENTERS
310-00
.420" .420"
258° 250°
107° 108°
310-x5
.510" .510"
288° 288°
108° 114°
DESCRIPTION AND APPLICATION
INTAKE OPEN/CLOSE RUNNING EXHAUST OPEN/CLOSE CLEARANCE
OFF ROAD RACE PROFILE. Must use R/D kit. 22 btc/56 abc Strong mid-range, wide power band. 63 bbc/17 atc Use modified piston. Modify compression release or rocker arm for reduced base circle diameter. FULL RACE PROFILE. Must use racing piston, 36 btc/72 abc springs, etc. TOP END, desert racing. Must 78 bbc/30 atc grind rocker cover. TDC in = .179" ex = 157"
.006" .008"
.006" .008"
SUZUKI GS-500 [425, 450] TWIN (1978—1992) Hardfaced cams, per pair, on customer cores. #60-4046 K.P.M. valve springs, uses stock tops, GS-500/425/450. CAM NUMBER
VALVE LIFT
DURATION AT .040"
LOBE CENTERS
384-00
.354" .354" .380" .380"
254° 254° 261° 261°
110° 110° 107.5° 108.5°
384-20
.417" .417"
268° 268°
107° 107°
384-x4 Stock
.438" .345" .326"
258° 243° 246°
384-70
DESCRIPTION AND APPLICATION
OK with stock pistons and springs. Increased mid-range power in stock motors. Use modified pistons and springs. Best all around street and road performance. Increased mid-range and top-end. Wide, smooth power band. Must use modified pistons and springs. Road race performance. Maximum top-end power. Power from 3500 to 8500 with high compression. SHIM UNDER BUCKETS. Full race profile. Stock 1989 GS-500 E for your reference.
All timing is quoted at .040" lift at the valve with zero checking clearance unless otherwise stated.
52
INTAKE OPEN/CLOSE RUNNING EXHAUST OPEN/CLOSE CLEARANCE
17 btc/57 abc 57 bbc/17 atc 23 btc/58 abc 59 bbc/22 atc
.003" .003" .004" .004"
27 btc/61 abc 61 bbc/27 atc
.004" .004"
Apr 10, 2012
