Useful GT550 infornation
Posted: Mon Nov 17, 2014 8:37 am
Found this on Wikipedia while surfing around this morning. Thought it was worthwhile copying and posting. I was really trying to find out why the GT550 runs 'backwards. Didn't find that.
GT550 Engineering Changes And Modifications
From engine no. 23036 onwards: a new screw-in style of SRIS check valve was fitted to replace the original press fitted style.[8]
From engine no. 24552 onwards: a new spring type washer was fitted to retain the primary drive gear. Retrofitting earlier engines was recommended.[9]
From engine no. 25054 onwards: a new hardened steel key was fitted to the primary drive gear. Retrofitting earlier engines was recommended.[9]
From frame no. 32292 onwards: a revised front brake caliper piston, seals and brake pad set were fitted to alleviate brake disc squeaking.[10]
From engine no. 27536 onwards: for Nippon Denso alternators only a new rotor with revised winding style was fitted. This was to prevent premature failure of the field windings and consequent loss of charging current.[11]
From engine no. 32854 onwards: a new metal particle strainer was fitted to the SRIS check valves to replace the previous plastic items which had been found to melt in service.[12]
From frame no. 36783 onwards: a new style of spark plug cap and insulator to prevent unwanted high tension current flashover to ground on the Ram Air shroud.[13]
From frame no. 39304 onwards: a modified fuel petcock was fitted to prevent fuel starvation at high speed.[14]
From frame no. 60143 onwards: a revised Ram Air shroud with new style spark plug caps was fitted to again try to finally cure unwanted high tension current flashover to the shroud under certain conditions.[15]
From frame no. 60904 onward: a new style rear brake panel with wider brake shoes, a revised cam and arm are all fitted to improve rear braking performance.[16]
From engine no. 63692 onwards: a completely revised Borg-Warner style starter clutch and associated parts were fitted to improve the durability of the starter clutch. Field experience had shown that the old style 3 roller starter clutch was not durable enough. This modification can be retrofitted to earlier bikes as necessary.[17]
From frame no. 64337 onwards: a new style petcock lever seal was fitted to prevent fuel seepage from around the lever.[18]
From engine no. 66724 onwards: a new style gear indicator switch was fitted. The crankcases were also revised to accept this new style switch along with additional parts to cater for the new switch.[19]
GT550 Engineering Changes And Modifications
From engine no. 23036 onwards: a new screw-in style of SRIS check valve was fitted to replace the original press fitted style.[8]
From engine no. 24552 onwards: a new spring type washer was fitted to retain the primary drive gear. Retrofitting earlier engines was recommended.[9]
From engine no. 25054 onwards: a new hardened steel key was fitted to the primary drive gear. Retrofitting earlier engines was recommended.[9]
From frame no. 32292 onwards: a revised front brake caliper piston, seals and brake pad set were fitted to alleviate brake disc squeaking.[10]
From engine no. 27536 onwards: for Nippon Denso alternators only a new rotor with revised winding style was fitted. This was to prevent premature failure of the field windings and consequent loss of charging current.[11]
From engine no. 32854 onwards: a new metal particle strainer was fitted to the SRIS check valves to replace the previous plastic items which had been found to melt in service.[12]
From frame no. 36783 onwards: a new style of spark plug cap and insulator to prevent unwanted high tension current flashover to ground on the Ram Air shroud.[13]
From frame no. 39304 onwards: a modified fuel petcock was fitted to prevent fuel starvation at high speed.[14]
From frame no. 60143 onwards: a revised Ram Air shroud with new style spark plug caps was fitted to again try to finally cure unwanted high tension current flashover to the shroud under certain conditions.[15]
From frame no. 60904 onward: a new style rear brake panel with wider brake shoes, a revised cam and arm are all fitted to improve rear braking performance.[16]
From engine no. 63692 onwards: a completely revised Borg-Warner style starter clutch and associated parts were fitted to improve the durability of the starter clutch. Field experience had shown that the old style 3 roller starter clutch was not durable enough. This modification can be retrofitted to earlier bikes as necessary.[17]
From frame no. 64337 onwards: a new style petcock lever seal was fitted to prevent fuel seepage from around the lever.[18]
From engine no. 66724 onwards: a new style gear indicator switch was fitted. The crankcases were also revised to accept this new style switch along with additional parts to cater for the new switch.[19]