MAIN JET #89 IDLE JET #35 ---- TAKES A 35MM AIR FILTER THIS CARB NEEDS OUR 300001.5 MANIFOLD TO WORK ON THE CT70'S YOU CAN THEN USE THE STOCK AIR FILTER OR CLAMP AN AFTERMARKET FILTER ON THE BACK. THIS WILL ALSO BOLT UP TO OUR BIG MANIFOLD (300002) AND THEN WITH A CLAMP ON FILTER FIT ON MOST 50'S AND 70'S IF YOUR PUTTING THIS ON A CT70K0/HK0 K1 K2 OR K3 MODEL,, OUR CABLE 0013 WORKS WITH OUT MODS. (THANKS ENZO) sometimes the inner cable length on the stock cable may be a little bit too long for the aftermarket carbs and not allowing for a complete throttle slide lifting, so you may want to get a solder on cable end so you can shorten it if needed... our number is (END)sold seperatly 20MM_CARB GREAT_FOR BIG_BORE 50'S AND 70'S W/ BIG MANIFOLDS MANY_OTHER_APP'S (300012) 300012$21.75 SPECIAL !! 5 EA OF 300012 CARBS FOR 1 LOW PRICE (5PACK/300012) 5PACK/300012$89.99 LOTS OF MEASUREMENTS MORE MEASUREMENTS SOLDER ON INNER THROTTLE CABLE ENDFOR SHORTINING INNER CABLE LENGTHS END$1.59 SIDE PULL UNIVERSAL THROTTLE ASSY 7/8" BARS (209H)I have found that this is the best universal twist throttle to be used on the two-part handlebars, that have the brake lever perch Welded to the bar. The throttle cable is fairly long so you may have to shorten it. To do so you may need one of the Solder on small brass barrels listed below on this page. 209H$19.99 on a ct90 "OUR new type FRAME cover (DTC_ZE) did fit"CLICK PICTURE FOR MORE INFO JUST AN OPTION IF YOUR CT90K1 CARB IS BEYONDCLICK ON PIC * YOU WILL NEED TO FIND A K2 OR NEWER CT90 MANIFOLD AND USE OUR (DTC_ZE) NEW STYLE DOWN TUBE COVER THEN THIS CARB -- FOR STOCK ENGINES YOU WILL NEED A SMALLER MAIN JET THIS WORKED (GREAT AS IS FOR JETTING) WITH A BIG BORE PISTON KIT INSTALLED. *BOLT 6MM X 25MM (B81F)FITS MISC. BUT ALSO THE BELOW LISTED ITEMS... CONNECTS MOST AFTERMARKET CARBS,, TO THE STOCK MANIFOLD'S ON HEADS # TRX70 CARB TO MANIFOLD AND MANIFOLD TO HEAD BOLTS B81F$0.62