sgtshultz

My Feedback: (28)

What are some good rings for a Zenoah G23?

w8ye

My Feedback: (16)

Frank Bowman rings

Frank lives in Farmington, NM

flyinwalenda

My Feedback: (5)

Frank Bowman   Email is: [email protected]  .
He makes very good rings for almost any engine. I swap his rings into new engines as well for improved performance.  He has them for the Zenoah.

BadAzzMaxx

You will have to Email Him

[email protected]

Some of the rings he makes.

Abatar 120 4/C
Ace Twin .64
Aero .35
Aerrow 100 (pin) Quadra
Aerrow 200 (pin) Quadra
Aerovat 65 CC (pin)
Aircom M61 (pin)
Air-O .45
Anderson Spitfire .65
Area 51CC (pin)
Asp .52 4C, .61 (pin), .65 4/C, .80 4/C, .91 4/C
Atomic 60 Don Sohr
Atwood .49, .51, .63
Avion Mercury 1.609
Avistar .60 (pin)
Bantam .16
Bat .19
Bennelli 65 CC (pin) motorcycle
Berilli 36 CC (Pin)
BME 3.5 Twin (pin), 105 (pin), 110 twin (pin)
Brillelli 60 CC (pin)
Brison 2.4 (pin), 3.2 (pin)
Brown Jr. .60 cylinder sizes vary (send Piston & cylinder for proper fit & correct ring)
Brownie .29
Bushwacker 37.7 CC (pin) Sears
Bunch .45, .49
Cameron .15, .19
Cave Cobra
Chung Yang 29CC (pin)
Cleveland Tom Thumb .45
Comer 50CC (pin)
Como .29 (pin), .40 (pin), .51 (pin), .90 (pin)
Contestor D.60
CRRC Pro 26CC offset pin notch, CRRC 26 centered pin notch, 40 CC (pin), Pro 45 CC (pin), GF 50 i (pin), GF 55 Twin (pin)
CS .53 (pin)
Cub Cadet 25CC (pin)
DA 50 (pin)1.681 Bore, 50R (pin)1.678 Bore, 60 (pin), 85 (pin)
DL 50 CC (pin)
DLE 20 CC (pin), 30 CC (pin), 55 CC (pin),110 Twin (pin), 170 Twin (pin), 222 4 cylinder (pin)
DME 100 Twin (pin)
Dooling .29, .61, Yellow Jacket
DZY 48 CC Twin (Pin)
Echo 16CC (pin), 21CC (pin), 21.2 CC (pin), 24.4 CC (pin), 30 CC (pin), CS-3000 (pin), 50 CC (pin), 65 CC (pin)
Edco Sky Devil .64 Old or New (RJL) state which one?
Elf Andrea Heine Repo
Enya 3.5 (pin), .30 SS (pin), .35 X (pin), .40 X Dykes (pin), .40 Dykes model 6002, .40 4/C, .45, .45SS (pin), .46 4/C,.49 X (pin), 50SS (pin),.53 4/C, .60 4/C, .60 X (pin), .60 standard, .61 CXLR rear Ex.(pin), .61CXRS side Ex.(pin), .80 X (pin), .80 4/C, .90 4/C, 120 4/C, 120 R 4/C, 1.55 4/C, 240 4/C Twin
ETA .29
EVO 150 Twin (pin)
EVRA 190
Forster .29, .31, .88, .99
Fox 36 Sand Cast (pin), .40 Sch., .45, .50, .59 .047 thick ring and .030, .59 long shaft Ign., .60 Blue Head, .60 Eagle, Eagle II .60 (pin), Hawk
Red Head .60 (pin), .74, .78, 120 Twin (pin), Gas Bore 1.439 ? (pin)
FPE 4.2 69CC (pin)
Fuji 32CC (pin), 43 CC EI (pin), BT50 SB (pin)
GMS .61 (pin), .61 Dykes (pin), .76 Dykes (pin),.76 Std. (pin), 1.20 Dykes (pin)
Hassad Blue Streak .64
HB .21 Dykes,.25 Dykes, .40 PDP Dykes, .40 Black Head (pin), .50 Dykes, .61 (pin), .61 Dykes
Hiller (Car)
Hirobo 36 (pin)
Homelite HK-24 (pin), 25 CC, 30 CC (pin) old .060 thick pin centered (press in ) , 30 CC newer .030 thick (pin), 30 CC new style Off set pin, 33 CC (pin), 38 CC (pin), 40.6 CC Super EZ Chain Saw, Super Mini Chainsaw Dykes (pin), 45 (pin), 50 CC (pin)
Honda SA 50 (pin)
Horner 3.7 Twin (pin)
Hornet .19, .60
Howler .60 (pin)
HP .21 4/C Dykes ,.40 (pin) ,.61 R.I. Silver Star (pin), .61 Dykes (pin) Blk Case Gold Hd.
Hurluman 60
Husqvarna 2100 (pin) Chainsaw Pin needs pressed in 1/2 way
Irvine .20 Dykes, .25 Dykes, .36, .40 Pylon Dykes (pin), .40 Standard (pin), .46 MKII Q46 Dykes, .61 Dykes, 120 Dykes, 150 standard non pin.
JBA 15 CC (pin)
JC Evo 23 CC (pin), 28 CC (pin), 30 CC (pin), 60 CC (pin), 1.20 CC (pin)
John Deere 100 G
Kavan MK 50
Kaw T5A 60 CC (pin) Artic cat Snowmobile
Kawasaki 22 CC (pin)
KDC Kioritz 21.2 CC (pin), 23.6, 25 CC (pin), 30 CC (pin), 58 CC (pin)
K&B .35 Dykes, .40 Dykes, .40 S Dykes (pin), .61, .61 Dykes (Lee Custom), 1.35 (pin), 1.5 (pin)
Kometa 29
Kraft .61 (pin)
Kratmo 10 CC, 4A Ignition
Laser 61 4/C
Lewis 60
Magnum .52 RFS 4/C, .53 XL 4/C, .61 XL (pin), .61 4/C, 70 4/C, .91 XL 4C, 120 4/C, 120 (pin)
Maloney 100 (pin), 125 (pin)
McCoy .09, .19, .19 Dykes B.H., .21 Dykes Car, .29 all versions, .29 Dykes B.H., .35 Dykes B.H., .36, .40 Dykes B.H., .49, .55, .60, .60 Dykes
McCulloch 15 CC ? (pin) 1.024 Bore, 21 CC (pin), 21 CC 60SX (pin), 25 CC (pin) MDB 90 Leaf Blower, 28 CC, 32 CC (pin), 50 CC (pin)
MDL 28 CC (pin)
MDS .78 (pin), 1.48 (pin), 2.18 (pin)
Merco .40, .49, .49 Dykes, .50, .61, .61 Dykes
Micron 60
MLD 28 (pin), MLD 70 twin (pin)
Moki M .51 (pin), .61 (pin), 1.20 (pin), 1.35 (pin), 1.50 (pin), 1.80 (pin), 2.10 (pin)
MT 42CC (pin), 50CC (pin), 57CC (pin), 65CC ? Twin (pin)
MVVS .40 Dykes (pin)
O&R Industrial Motor 1 HP
OPS Maxi .30 (pin)
OS .20 FS 4C, .26 4C, .28 FH Dykes (pin), .30 fs 4/c, .32 (pin), .37 H (pin), .40 H Dykes, .40H Standard, .40 H (P) Pylon, .40 FS 4/C, .40 SF (pin), .807 bore, .40 SR (pin), .40 FSR .835 Bore (pin), .40SR Dykes (pin), .45 FSR (pin), .45 FSR Dykes (pin),.45 RSR Dykes, .46FX (pin), .46SF (pin), .46 SF-H (pin), .46 4/C, .48 4/C Surpass, Max .50 old, .50 FSR Dykes (pin) ,.50 H (pin), .50 SX & SXH (pin), .52 4/C surpass, .55 Hyper (pin), .58, Max-H .60, .60 FS 4/C, .60 FSR (pin) .9445 Bore ,.61 SF .9055 Bore (pin), .61 FS 4/C, .61 SX (pin), .61 SXH (pin), .65 RSR (pin), .70 4/C, .70 SZ-H (pin), .75 4/C Surpass, .80 H,.80 Dykes (pin), FS.90 4/C, .91Surpass 4C, .90 FSR (pin), .91 FSR (pin), .91 FX (pin), .91 SX H (pin), .95 AX (pin), 1.08 BX-1 (pin), 120 4/C, 120 twin 4/C, 120 AX (pin), 160 FX (pin), 160 4/C, BGX-1 3500 (pin)
Peak .65 (pin)
Poulan 15 CC (pin), 25CC (pin), 25 CC Featherlite (pin), 32CC (pin), 35 CC (pin), 42 CC (pin), 42 CC Wildthing (pin), 46 CC (pin), 54 CC (pin), 60 CC (pin)
Pioneer Grass Trimmer Model B 440, 42 CC (pin)
Price Midget
Profi .40 (pin), .61 (pin), .76 (pin)
Quadra 35 CC , 40 CC (pin), 42 CC (pin), 50 CC (pin), 52CC (pin) ?, 100CC Aerrow (pin), 150 Twin (pin) , 200 CC Aerrow Twin (pin)
Quick Draw CC (pin)
RCGF 15 CC (pin), 20 CC (pin), 26 CC (pin), 32 CC (pin), 45 CC (pin)
RCS 1.40 (pin)
Ross .60 Dykes (pin), .60 opposed twin Dykes (pin), .61 (pin)
Rossi Speed .60 old, .60 (pin) .021, .61 (pin) .023, .65 (pin) .0235, Speed .65 (pin)
Rowell .60
Royal 40 (pin)
Ryobi 26 mm Bore EJ 100 (pin), 31CC (pin) older .064 thick, 31 CC (pin) older .047 thick, 31CC latest model (pin)
Sabre .49
Sachs 2.0 (pin), 3.2 (pin) offset, 3.2 (pin) centered, 5.8 (pin), 80B (pin)
Saito FA .30 4/C, .40 4/C, FA .45 4/C, FA .50 4/C, FA .56 4/C, FA .60 Twin 4/C , FA .62 4/C, FA .65 4/C, 72 4/C, FA .80 4/C, FA 82 4/C, .90 4/C, .91 4/C, 100 4/C, 120 4/C, FA125 Golden Knight 4/C, FG 20 125 4/C, 130 TD 4/C Twin, 150 4/C .0585 thick, 150 4/C .039 thick, 180 4/C, 270 4/C Twin, 300 4/C Twin .0585 thick, & .039 thick.
Sap-180 HP 1.2 (pin)
Scott Thunderbird
Sears Weedeater, Bushwacker,18 CC, 21 CC, 25 CC, 25 CC TWC Leaf Blower, 37.7, all pinned, 1966 Allstate Moter Cycle engine made by Puch (pin)
Shindiawa 33 CC (pin)
SIFK 29CC (pin) AKA CY, Chun Yang
Skil chainsaw (pin)
Sky Chief .53
Solo 2/C tiller approx. 20CC (pin)
Spe 25.4 (pin), 26 CC (pin), 40CC (pin), 45CC (pin)
Stihl 25.4 (pin), 30CC (pin), 028 Chain Saw 44CC (pin), 45CC (pin), Super 45 (pin), 57CC (pin), 066 (pin), 62CC (pin), MS 440 Chainsaw, MS 441 Chain saw, 70 CC (pin)
Super Tigre G20.15, G20 .19, G20 X.25, S .29 (pin), G21.29 old, .34 (pin), .40 Bullring, S.40 (pin), G21.40 std., G21 .40 Dykes, G21.46 std. ,S.45 (pin), V.45, X.45 (Pin), G21 .46 wide Dykes, G.46, G .46 Bullring, V 51, G51 (pin) Italian, G51 (pin) China, V.56, V.56 Dykes, V 60 light case .044 or .047 top to bottom measurement, G24 60 Old, G 60 Bluehead, X60 (pin), V.60 wide & narrow Dykes, S.61
(pin), G.71, S.75 (pin) Italian, S.75 China, G.90 (pin) Italian, G.90 (pin) China, 2000 (pin), 2300 (pin), 2500 (pin), 3000 (pin) Italian, 3000 (pin) China, 3250 (pin) Italian, 3250 (pin) China, 4500 (pin)
SV 50 CC (pin)
Syncro B-30, Syncro ACE, Syncro ACE Special
Tartan 1.34 (pin), Twin .77 (pin)
Tech 23CC (pin)
Technipower 7 Cylinder radial, B series, 9 cylinder
TGY 26cc (pin)
3MM 53 TOC (pin), 150 Twin (pin)
3W 26 CC (pin), 80 CC Boxer Twin (pin), 85cc (pin), 170cc twin (pin)
Thunder Tiger .39 (pin), Pro .50 H (pin), .53 Red Line Heli (pin), .54 4C, .91 FS 4C, Pro .91 2C (pin), Pro 120 (pin)
Toki .40 (pin)
Troy Bilt 31CC (pin)
Tune Hill .36 (pin)
Turnigy 30 CC (pin), 50 CC TR-50 HP pin), 52 CC (pin)
Ueda .45, .61
US 25 CC (pin)
Vlvatam 2.5, 5 CC
Veco .19 Dykes, .21 Dykes, .50 Dykes, .61, .61 Dykes
Vega 10CC, 91 4/C
Webra .32 Speed Dykes (pin), 35 (pin), 10 ccm, 6.5 (pin), .40, .40 (pin), .40 Dykes (pin), .50 Dykes (pin), 52 (pin), .55C AAR Red Head Heli (pin), .61, .61 (pin), Speed .61 FS (pin), Speed .61 F Dykes (pin), .61 Dykes (pin), Speed 70 (pin), T480 4C Dykes, .91 (pin), 91 PS (pin), 120 Dykes (pin), 1.2 LS (pin), 91 T 4.90 (pin), R-145 (pin), 150 Speed (pin), 35 CC? Bully (pin)
Weedeater 18 CC (pin), 21CC (pin), 25CC (pin) 1.358 Bore, 25CC (pin) 1.380 Bore, 28 CC (pin), 32CC (pin)
Weedwacker 25CC (pin)
Westbury Atom III
XYZ 26CC (pin), 53CC STS twin (pin)
Yamaha 30 CC (pin), 50CC (pin)
YS .50 ST,.61 Long Stroke (pin), .63 4/C, .80 H (pin) 2C, F.91 AC 4C, .91 2C (pin), 110 4/C, FZ-115S, FZ-115S Crankshaft seal ring, F120 4C, Crankshaft seal ring (120 SC, 140L, DZ 160)
YW 24CC single & 48CC Twin (pin)
ZDZ 40 (pin), 50 NG RV (pin), 60 RV (pin), early 80 RV (pin), later 80 - J model (pin), 90 - 180 twin (pin)
ZEN G270 (pin) AKA Chung Yang
Zenoah G20 (Pin), G23 (pin), G26 (pin), G38 (pin), G45 (pin), G62 (pin), GT-80 Twin (pin)



Milton

dadragon

Frank has the G-23 rings for $11.00 + shipping.

karolh

Fitting a Bowman ring in your engine is the best favour you could ever do it.

Karol

av8tor1977

My Feedback: (6)

Yep! You'll love it.

AV8TOR

acerc

In the word's of the guy before me. "Yep! You'll love it."
In my word's. "I know I am."

captinjohn

Hey...we will all "love" it !!!!!!!!! Merry Crhistmas Guys....& ....A Happy new year. Capt,n

karolh

Hey Capt,n it's still quite a few days away but season's greetings to you too

Karol

djmoose

My Feedback: (4)

Sorry for maybe a stupid question, but what does (pin) mean by some of the engines listed?

CK1

My Feedback: (60)

It means that there is a pin installed in the ring grove between the land areas to keep the ring from rotating around the piston. This is to prevent the end of the ring from entering an open port area where it might snag and cause a great deal of damage

karolh

I would certainly change the wording from might snag, to will snag and cause a great deal of dsamage.

Karol

Ernie Misner

The ends of the (pin) rings have an arc machined in them that fits in registration with the pin in the piston groove. A 4-cycle ring does not have that. Does everyone know what a Dykes ring is?

Lifer

My Feedback: (1)

Dykes rings are low-pressure rings that use compression to tighten the ring against the wall as the piston rises. I used to race with a control-line guy in Northern California that made them. They are a great design.

Ernie Misner

Yes, they are "L" shaped and sit up high as possible on the piston. Why are they not popular on our modern gas engines? And don't some pistons have a small hole that allows compression gasses to get behind the ring and apply expanding pressure on the ring?

av8tor1977

My Feedback: (6)

Dykes rings work well for their intended apps, but have two draw backs. One is a higher wear rate than normal rings, and the other is you have to watch them carefully that they don't carbon up and stick since they sit high on the piston and have the "L" shape. Rotax ultralight airplane engines use Dykes rings, and you have to pull the exhaust manifolds off at regular intervals to inspect the ring for carbon and proper movement.

AV8TOR

CK1

My Feedback: (60)

The one time I try out using some optimism and you rain on my parade - Thanks!!!!! LOL

karolh

Happy New year.

Karol

s3nfo

My Feedback: (14)

Not popular in modern engines because they expand under compression. The higher compression the engine, the more pressure put on the cylinder walls, which increases wear and drag, which lowers power output. Dykes rings are a good idea for lower compression engines, bad idea for higher compression engines.

acerc

CK1 you could have struck back with his spelling of damage."dsamage"
Of course unless that was intentional. LOL

karolh

Very observant Acerc, certainly was not intentonal

Karol

CK1

My Feedback: (60)

I can't spell very good myself most of the time . I can't call someone out for mistakes I also make.

karolh

You are a true friend CK1

Karol