73 TX650 Early Dual Calipers – Front Tire Removal

Oddjob

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Hi Guys, been a while…

I’m attempting to revive and run the dual calipers that my 73 TX650 came with, I’ve re-plumbed the lines with hard-lines going to a splitter and then a flexible line to the master cylinder.

iH8oywaLNrYTXlwrciaf5Lf-YPrtcMRSe93aQIjyTOXDcLiromRpFlEY7N_w5dbhmL670JgpNf0xBhnoiHu7nhfn1bW-8B_6kpHGWwlV4uByACt4CKgC5Otq5Lx3ezP-knbY1ZOiiOiIrrDkOXqbgvKBa9LAWbHHxPpaGOdBvR081xFndU4tC5pbzaazEFyjgiX8NIgAZjM8-tFMFqhtxwDISEpCA_NVbwktDe0pmU9Md9q45BT8CRNkqVRx3pXwSA2EA5JGVMSCszubPubzumghwBu-LQU5DMyQq0DM3rEV9N90E5S8WC6z9v6-Hy0uZDo8I7oE8gdYR1GY10Fwu6NKFAcBOWHojIW_tKTbDpc8995SY_xqED-XmkH9D98ItMJirZCBbY-BwqdpfNkQa91Warw1glHXyo8KLLcGAI_TR3kwktTK_FffmL1aa0mFj7rJMuUliuoTG-7dNnSX6KOFoXXgcGOu_lfOz__5ioXNHF3CZxnztkBThi7WrEXpuZ_cEdVxnY9GBAnqK8Y-waIInNZs50gcuxS0lb5gs6VVejgyEd4zlyvnn1241JFxktL7HzU37t-WwoPpS4ajOA8TgnuLEnnaWXDENcw0ibMiiFvjq15HVU07g__gqomSTlwlcE9jPMB4qu-_iQab1Gi49KuaNjGu9-BVwIfx1QwwiBtIIVFPxsDynNhyMwVISDOzBJmclvUFNGNxMdSGU0JlJbI7uxtOSQx3qilLD3SMEatx=w1730-h1297-no


So, my question is, how does one remove the front tire/rime without disconnecting the left side caliper?

czhWcltockwctK22geeBdF-fI5KMxrvdW8BOWaB2ekUCglvD8YH4xxA1PLwcBaLuKsEfzoYCBhH2u5yR6sbc5goQTFAkcvCMwj--EN3tyDsgIl_xg9KknD18ZwKakeNw3L_gW7KfUu5cG5cR0yFmvyrqzQPfgcR62byvCI-S14u1L58Xud2aO2Rhu6rsv33An7mMCBAhf40SRPqc2dCv-_VV5eNpi6rQ5MrAzGYJOouLMx4K0_q3KzRlSQNT7qTNZCGoi5g1LbCjAb7fYUUjhEVqzx65GmrmX3MEypKB44poNo_xzk5yxe8EGbws5qayy4SO9N_P89OV7TB2coj6jqNgVt1jSxc-Cf_bqNVcvC1zHdIvBkkg6348NPgA_HkC-dpvGahSWKktj0LV_nFjCj9emgVg_7Pll4GC7eI4CUeYWt3x4gZNIUkKBdRLV6D53DZVBa3KL6CSzBHxLw6cafeQ6lyPU3ExW0YuwMdX1mGhih5_dPnHl407Mp7prLwByE5nW2teTHQADBZID0CpQYIWVo8U2U1UxtcKNoXNn8hvKQlLG4KfVoSWwAX-6UlWZY_BrLHKxpRqE1anmUSSR_fWTVAPNdDxYJk2X1-j1Ji5Y8ofhbuVNaJEfBWAISf2pi1mqaESCeS_pjuteyOFATZWvYxgBiI0wHzT_GN6_IpZfOzkvwjCA2DaMkVbskyMPwGaPbd5rsT9c7GkwbbChrQDCN3sr2K6-lsX_vFpqDrUKcYy=w1730-h1297-no


The caliper inside face to face distance is approximately 54mm, and the rim width 70mm preventing the tire/rim from dropping straight down.

IJa7ABwnRe1NU5DIsxiofSUn3_GyQSRobcSAyGwKNTikpkHURR_xts7orcRlQI8V1HKKTmFu5hB0QM__Vb6F3z-kI9WiNj-r-DnX2nM55HDOO0zf1o4VdZ2pejCsWmmJ4WtSepJXnjU8c8n3GMIh4xRbIj92LJD6nfdRY2CpKq74g-z6_E3MfDd1Pd2CNUXlRMQvc9W52zObEaHqDSIt0aThY7Kxbp3J7dc2zFeN290tVZwX6BYtLiZ2NzrifTBa5U-z36PdQfnQ0_JrnIwWP8WC_QJqJxZlCHy7Bal7AgIodli14A33JymJPxzmcngC0vYmLO3HSO7B07G9H7vG47X3qnYT-iskUreRLagRpc13VenioMX8MQ_07c0RVtrhwpo6bRv1pMf_tCt5-pFopzhv4p0eVtlzy_v55AynP6QRBZ4OH3rOd8ZqzU4B7YxV3qgECNc86Uhz6kp974Ja_sydDCe89NwT9TAvw5gZ_O9GUbtqGawsMYF1bPZuodyVqdN3U8LXFU48-1iW69qifiqQiqyn7l8ndv47DH-KFhUuBABxS_00KpMzVSAsvqQyxPQrhVy34VEGG-ZDIJunyMn2-ZN-2ccbWptN_GA6OZA1LBzKpOQoFHwayWrjeYTE-M9l9zmdmyZR2EWKduIAGPFo_Uw0G0B1jTTDpLso8PynWaeyp8nsYwuHpR73udKFU-XmlepmiyHQd4vhbUr0BZ4XQ9P7OjNe_DWvJQIP4dTAe8yC=w1730-h1297-no


The only way I can seemingly remove the tire is to rotate the left side caliper on the top stud to clear the left rotor and then fight like crazy with a combination of wiggling the rim, and cursing to slide it past the right rotor/right-side caliper.

Rotating the left caliper to the amount shown to clear the left rotor, requires it to be disconnected at the caliper. A flexible line wouldn’t help as the connection (blue plug in the photo below) would still interfere with the fork and still need to be disconnected at the caliper. Essentially at this point you have removed the left caliper, and need to re-bleed the system.

KO1azjSeBqXbb9LfkeErjJWHbkHEIaM6psWVUU6a_0xKYpc7LA2sO5FG8h37ZNpcD-EbQiIhbGEQKvgialji-9g2BL10i3hSJT2MshQtv6EOBqI3BcixdxuY8ZE5OZo-9NdrtHX5QaZhbrcZs1tjEM8FrOdrKaQSofgtUkxrRR2OAocjhJvgEEaovMJVLMs20NZ-u_ba1GQjOlQMjO31DlHC-hhMxxOrPzrcpJpFf8oXMu3zk30uFoX0lcyj1Q10fratpCHb6WvUPM9W3Fz_3vnvw2Cz-K3nHnpUshIiWhYauoL8kmm2TIUCMLCqgpb3bu0-PZh0UtwY2cXD_h1CIUEnRgDOBSbHWM2Q02T9k8kzAuY8eG5SdFcHgRolBUErPuwZtUCoiaa3r3DEpbcSy5sGqkhc6iJVIFMp8BNksoJna7DAV95DaLkYDqLw-Bw4S-mC8OFJ0-Fyt8hqqdJ4q_IhzXIxTRvWtILqmsCEe1IZ6_rizT-MXgTmGZpmYCRu226KZahWQThmCyYvWSpHZYeVK-dDHMy_Ss697zrQu7m5MJ0TxDnTha5OMQ2vD_V3_sj_sq6WNnRuNcgPTqIwDEZtz3njULtjFzVKuxDqzq2go4ZIYCccVqktawngAucuiH_nL7TAU-PLOwTQUqpm22RFvGxi6ewnO_72QBgKkYAIiXEJF5C5XY4JyKqX2dALX-iYZeBpUNLFvFWtptGSf0RbdBVKH7WyUiD9_Lj7ZllHyfjG=w1730-h1297-no


So, long story short, is it common practice to have to disconnect (or remove) the left side caliper (ie disconnect the hydraulics at the caliper) when removing the front tire/rim on early dual calipers?

Edit: clarified disconnecting at the caliper...
 
Last edited:
Hi Guys, been a while…

I’m attempting to revive and run the dual calipers that my 73 TX650 came with, I’ve re-plumbed the lines with hard-lines going to a splitter and then a flexible line to the master cylinder.

iH8oywaLNrYTXlwrciaf5Lf-YPrtcMRSe93aQIjyTOXDcLiromRpFlEY7N_w5dbhmL670JgpNf0xBhnoiHu7nhfn1bW-8B_6kpHGWwlV4uByACt4CKgC5Otq5Lx3ezP-knbY1ZOiiOiIrrDkOXqbgvKBa9LAWbHHxPpaGOdBvR081xFndU4tC5pbzaazEFyjgiX8NIgAZjM8-tFMFqhtxwDISEpCA_NVbwktDe0pmU9Md9q45BT8CRNkqVRx3pXwSA2EA5JGVMSCszubPubzumghwBu-LQU5DMyQq0DM3rEV9N90E5S8WC6z9v6-Hy0uZDo8I7oE8gdYR1GY10Fwu6NKFAcBOWHojIW_tKTbDpc8995SY_xqED-XmkH9D98ItMJirZCBbY-BwqdpfNkQa91Warw1glHXyo8KLLcGAI_TR3kwktTK_FffmL1aa0mFj7rJMuUliuoTG-7dNnSX6KOFoXXgcGOu_lfOz__5ioXNHF3CZxnztkBThi7WrEXpuZ_cEdVxnY9GBAnqK8Y-waIInNZs50gcuxS0lb5gs6VVejgyEd4zlyvnn1241JFxktL7HzU37t-WwoPpS4ajOA8TgnuLEnnaWXDENcw0ibMiiFvjq15HVU07g__gqomSTlwlcE9jPMB4qu-_iQab1Gi49KuaNjGu9-BVwIfx1QwwiBtIIVFPxsDynNhyMwVISDOzBJmclvUFNGNxMdSGU0JlJbI7uxtOSQx3qilLD3SMEatx=w1730-h1297-no


So, my question is, how does one remove the front tire/rime without disconnecting the left side caliper?

czhWcltockwctK22geeBdF-fI5KMxrvdW8BOWaB2ekUCglvD8YH4xxA1PLwcBaLuKsEfzoYCBhH2u5yR6sbc5goQTFAkcvCMwj--EN3tyDsgIl_xg9KknD18ZwKakeNw3L_gW7KfUu5cG5cR0yFmvyrqzQPfgcR62byvCI-S14u1L58Xud2aO2Rhu6rsv33An7mMCBAhf40SRPqc2dCv-_VV5eNpi6rQ5MrAzGYJOouLMx4K0_q3KzRlSQNT7qTNZCGoi5g1LbCjAb7fYUUjhEVqzx65GmrmX3MEypKB44poNo_xzk5yxe8EGbws5qayy4SO9N_P89OV7TB2coj6jqNgVt1jSxc-Cf_bqNVcvC1zHdIvBkkg6348NPgA_HkC-dpvGahSWKktj0LV_nFjCj9emgVg_7Pll4GC7eI4CUeYWt3x4gZNIUkKBdRLV6D53DZVBa3KL6CSzBHxLw6cafeQ6lyPU3ExW0YuwMdX1mGhih5_dPnHl407Mp7prLwByE5nW2teTHQADBZID0CpQYIWVo8U2U1UxtcKNoXNn8hvKQlLG4KfVoSWwAX-6UlWZY_BrLHKxpRqE1anmUSSR_fWTVAPNdDxYJk2X1-j1Ji5Y8ofhbuVNaJEfBWAISf2pi1mqaESCeS_pjuteyOFATZWvYxgBiI0wHzT_GN6_IpZfOzkvwjCA2DaMkVbskyMPwGaPbd5rsT9c7GkwbbChrQDCN3sr2K6-lsX_vFpqDrUKcYy=w1730-h1297-no


The caliper inside face to face distance is approximately 54mm, and the rim width 70mm preventing the tire/rim from dropping straight down.

IJa7ABwnRe1NU5DIsxiofSUn3_GyQSRobcSAyGwKNTikpkHURR_xts7orcRlQI8V1HKKTmFu5hB0QM__Vb6F3z-kI9WiNj-r-DnX2nM55HDOO0zf1o4VdZ2pejCsWmmJ4WtSepJXnjU8c8n3GMIh4xRbIj92LJD6nfdRY2CpKq74g-z6_E3MfDd1Pd2CNUXlRMQvc9W52zObEaHqDSIt0aThY7Kxbp3J7dc2zFeN290tVZwX6BYtLiZ2NzrifTBa5U-z36PdQfnQ0_JrnIwWP8WC_QJqJxZlCHy7Bal7AgIodli14A33JymJPxzmcngC0vYmLO3HSO7B07G9H7vG47X3qnYT-iskUreRLagRpc13VenioMX8MQ_07c0RVtrhwpo6bRv1pMf_tCt5-pFopzhv4p0eVtlzy_v55AynP6QRBZ4OH3rOd8ZqzU4B7YxV3qgECNc86Uhz6kp974Ja_sydDCe89NwT9TAvw5gZ_O9GUbtqGawsMYF1bPZuodyVqdN3U8LXFU48-1iW69qifiqQiqyn7l8ndv47DH-KFhUuBABxS_00KpMzVSAsvqQyxPQrhVy34VEGG-ZDIJunyMn2-ZN-2ccbWptN_GA6OZA1LBzKpOQoFHwayWrjeYTE-M9l9zmdmyZR2EWKduIAGPFo_Uw0G0B1jTTDpLso8PynWaeyp8nsYwuHpR73udKFU-XmlepmiyHQd4vhbUr0BZ4XQ9P7OjNe_DWvJQIP4dTAe8yC=w1730-h1297-no


The only way I can seemingly remove the tire is to rotate the left side caliper on the top stud to clear the left rotor and then fight like crazy with a combination of wiggling the rim, and cursing to slide it past the right rotor/right-side caliper.

Rotating the left caliper to the amount shown to clear the left rotor, requires it to be disconnected. A flexible line wouldn’t help as the connection (blue plug in the phot below) would still interfere with the fork and still need to be disconnected. Essentially at this point you have removed the left caliper.

KO1azjSeBqXbb9LfkeErjJWHbkHEIaM6psWVUU6a_0xKYpc7LA2sO5FG8h37ZNpcD-EbQiIhbGEQKvgialji-9g2BL10i3hSJT2MshQtv6EOBqI3BcixdxuY8ZE5OZo-9NdrtHX5QaZhbrcZs1tjEM8FrOdrKaQSofgtUkxrRR2OAocjhJvgEEaovMJVLMs20NZ-u_ba1GQjOlQMjO31DlHC-hhMxxOrPzrcpJpFf8oXMu3zk30uFoX0lcyj1Q10fratpCHb6WvUPM9W3Fz_3vnvw2Cz-K3nHnpUshIiWhYauoL8kmm2TIUCMLCqgpb3bu0-PZh0UtwY2cXD_h1CIUEnRgDOBSbHWM2Q02T9k8kzAuY8eG5SdFcHgRolBUErPuwZtUCoiaa3r3DEpbcSy5sGqkhc6iJVIFMp8BNksoJna7DAV95DaLkYDqLw-Bw4S-mC8OFJ0-Fyt8hqqdJ4q_IhzXIxTRvWtILqmsCEe1IZ6_rizT-MXgTmGZpmYCRu226KZahWQThmCyYvWSpHZYeVK-dDHMy_Ss697zrQu7m5MJ0TxDnTha5OMQ2vD_V3_sj_sq6WNnRuNcgPTqIwDEZtz3njULtjFzVKuxDqzq2go4ZIYCccVqktawngAucuiH_nL7TAU-PLOwTQUqpm22RFvGxi6ewnO_72QBgKkYAIiXEJF5C5XY4JyKqX2dALX-iYZeBpUNLFvFWtptGSf0RbdBVKH7WyUiD9_Lj7ZllHyfjG=w1730-h1297-no


So, long story short, is it common practice to have to disconnect (or remove) the left side caliper when removing the front tire/rim on early dual calipers?

Hi Oddjob,
removing a caliper works OK but it lets the caliper swing around on it's hose like Tarzan on a jungle vine.
What I do on my dual front disk XS650 is to remove the fender so the fork lowers and calipers can be rotated out of the way so the wheel can be dropped down and rolled out forwards.
 
Hi Fred, I would be happy to get it to the stage where I could dangle it in mid air, but the problem is that I cant rotate the caliper up enough to clear the top mounting stud, without disconnecting the brake hose/line at the caliper...

I do however like your suggestion of removing the fender and rotating the lowers... :cheers:

Would love to hear from anyone running early dual brakes... I find it hard to believe that Yamaha would make something that might need to be potentially done on a roadside so hard to do...
 
Or remove that stud and replace it with a bolt. so the caliper can be pulled up and or forward then out.
Could be worse on madness with a 3" wide x 18" rim
I have to take both calipers off the carriers and work out both sets of shoes to get them off the rotors and get the wheel on and off. :rolleyes:
 

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Thanks for the suggestion gggGary… seems so easy when someone else points it out for you…

So, to test gggGary’s suggestion I removed the offending stud and left the hydraulics connected, disconnected the front fender stay, and moved the left caliper forward… In this position, and with a bit of cussing, it is possible to remove and install the front tire with the hydraulics connected.

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Unfortunately, the stud is a reducing stud, M12-1.25 on one side and M10-1.25 on the other side (right side stud in picture below).

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So I decided to modify a M12-1.25 x 70 bolt to accept the M10 acorn nut in place of the hex head in order to maintain the factory look (middle stud in picture above). I red-loctited the acorn nut on to the modified M12 bolt, and opened up the hole on the fork lower to accept the M12 bolt. A 5mm spacer is required to take up the hex height on the factory stud.

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The end installed look is factory-ish and should allow me to remove the tire in the future without disconnecting the hydraulics.

Still don't know how the 74-75 dual brake folks would have gotten around this with their factory setup... :umm:

:cheers:
 
I believe that 74-75 came equipped with the left side lower to accommodate dual brakes for certain markets... the 73 manual does not show a disk brake left lower, but the manual could be wrong-ish or my bike could been built in late 73...

My bike also appears to have the 74 style gas cap but the manual shows that it should have came with a 72 style cap...

So who knows.... :D
 
Last edited:
73/74/75 years on the TX/XS650.......... 73/74 TX750..........73/74/75 TX/XS500 and 73/74/75 RD250/350s all have the same Petrol cap as your 73TX
In Europe twin discs came out on the 75B and down under 76 was the first year for twin discs.............In Canada it is an unknown when the first year twin disks, If at all, came out.

Your bike is looking nice............
 
73/74/75 years on the TX/XS650.......... 73/74 TX750..........73/74/75 TX/XS500 and 73/74/75 RD250/350s all have the same Petrol cap as your 73TX
In Europe twin discs came out on the 75B and down under 76 was the first year for twin discs.............In Canada it is an unknown when the first year twin disks, If at all, came out.
Your bike is looking nice............

Hi Skull,
I've never seen a dual front disk Canadian XS650 that didn't have it's second disk installed as an aftermarket modification.
And yeah, nice looking bike. Perhaps I'll be inspired to clean mine this spring. If the snow ever melts.
 
Hi Skull,
I've never seen a dual front disk Canadian XS650 that didn't have it's second disk installed as an aftermarket modification.
And yeah, nice looking bike. Perhaps I'll be inspired to clean mine this spring. If the snow ever melts.

Fred, thanks, i didn't think Canadian models came out with twin discs. I have seen the option in the Canadian 77D parts manual as you mention. Must have just been Europe and the Oceania models.
 
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