Sacred Bones MC (International)

Saddletramps Motorcycle Club (Edinburgh)

Saints and Sinners MCC (UK)

Salty Dawgs Motorcycle Club (Virginia)

Salutation MCC (UK)

Salvation Riders MC (Norway)

Salvation Riders MC International

Samurai MCC (UK)
San Diego Motorcyclists
Sandnes MC Club (Norway)

San Francisco Motorcycle Club

San Jacinto High Rollers Motorcycle Club

San Jose Dons MC
Santa Cruz Vampires MC and Scooter Club

Saracens MCC
Saracens MC (Maine) Skeleton Crew

Sarajevo Bikers Club MC (Bosnia and Herzegovina)

Savages MC Mercheford (Cambridgeshire)

Schuylkill County Motorcycle Club (USA)

Scorpions MC (Russia)

Scorpions MCC (N. Ireland)

Second Brigade MC (North Carolina)

Selected Crowd Hog Club (Austria)

Semper Fidelis MC (NJ)

Servants Of Christ MM (Connecticut)

Sewer Rats Silsden (Yorkshire UK)

Shamrock MC (Law-Enforcement)

Shamrock Rose MCC (Ireland)

Shardana Biker (Sardinia Island, Italy)

Shedevils MC (Stockholm)

Shield Motorcycle Club LE (USA)

Shoulder of Mutton MCC (Derbyshire UK)

Shower of Bastards MCC

Sierra Shadow Casters MC (Mariposa CA)

Sick Bastards MC (Dickinson ND)
Silent Skulls International MC

Sillybuggeryness Rally Club (UK)

Singles Motorcycle Club (USA)

Siniestros MC (Argentina)

Singhayz Riderz MC

Sisters of Chrome WMC

Sisters of Scota WMC (National)

Sisters of Scota WMC (Sacramento)

69'ers MC (New York)

16 Squad (UK)

Skaraborgs MC Touring Club (Sweden)

Skeleton Crew MC

Skinback Fusiliers

Skull Riders IC

Skyra GB

Sniglar MC (Iceland)

Slovenia Moto club Sairach

Slow Ya Roll MC (Lillington NC)

Slut's "South London's Uncommitted Trikers"
Smokin' Kittys WMC (Memphis USA)

Smugglers CBC (UK)

Snake Eyes MC (Fayetteville NY)

Snatch MCC (Wirral UK)

Sober Bikers United

Sober Knights SC

S.O.B.E.R. MC

Soldiers Motorcycle Association (Finland)

Sombras Moto Group Biker (Spain)

Sons Of God MC

Sons Of Hell MC (UK)

Sons Of Silence MC (USA)
Sons Of Silence MC (Faribault Minnesota)

Sons Of Tangra MC - Bulgarians

Sons Of Texas MTA

Sons Of Thunder MC  (Oregon)

Souls Of Freedom M/M (Canada)

South Derbyshire Riders

South Side Riders MC (USA)
Southern Cross MC

Southern Cruisers Riding Club

Southern Cruisers Riding Club (South Lake)

Southern Legion MA

Southern Pride MC
Southern Posse MC (Mission Texas)

Southern Posse MC (Odessa Texas)

Sovereign Riders MC (NY)

Spades Motor City (Detroit)

Spartans MC (Germany)

Spartans The

Split Links MCC (UK)

Squirrel MC (Tensfeld Tyskland)

States MC (Florida)

Stella Polaris MC (Norway)

Sticks & Bones Charity Support Riding Club

Stompers MC  (Denmark)

Storm Riders Military Veterans MC

Stourbridge MCC (West Midlands UK)
Straight Riders MC (Washington DC)

Street Angels MC (Atlanta Georgia)

Street BIkes North West (Wirral UK)

Street Rats MCC (UK)
Street Soldierz Sportsbike Club (Colorado)

Strokers MC (Cyprus)

Strong Survive (Derbyshire)

Successful Apes MC

Suicide Frogs MCC (Burton-on-Trent)

Sundowners MC (San Fernando Valley)
Sunset House Motorcycle Club (Canada)

Swamp Riders MC (Southwest Arkansas)

Sweet Temtationz MC
Swiss Vintage Motorcycle Club
 

Tamworth & District Classic MC (Staffs UK)

Tatanka Wicasa MC (Belgium)

T-Bars Rally Club (Newport)

The End And More MCC (UK)

Teamsmurph MCC (Thetford UK)

Team Sober MCC (Leeds)

Templar Knights MC (Germany)

Templar Order (UK)

Tewkesbury and District MCC

Texas Highwaymen MC (Texas)

Thetford and District Motorcycle Club (UK)

Third Tradition MC (Virginia US)

13th Chapter MC (Thailand)
Thousand Oaks Riders Club

3B's Rally Club (UK)

Three Percenters MCC (UK)

Three Percenters (Milano)

Throttle Kings MC (Virginia)

Throttle Queens MC
Throttle Twisters MC

Thundercity HRC (Leeds UK)

Tiger MCC (Cambridge UK)
Ton Up Club

Tools MC Aalborg (Denmark)

Top Hatters MC (Hollister California)

Top Hatters MC Central Valley Chapter

Top Hatters MC (Sierra Mountains)

Top Hatters MC (South Valley)

Tribe of Judah MM International

Trikers T MC (Sweden)

Trinity Riders CMC

Triple Trouble MC (Texas Trike Club)

True Few MC (AusAntonio Texas)

True Justice MC

True Soldiers MC

Tsunami Riders MCC (Kent UK)

Tunnel Rats MC (Chicago Illinois)
Twin Club MC (Sweden)

Twin Heads MC Brønnøysund (Norway)

Tyne Cyclones MCC (North East England)