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<blockquote data-quote="pollyp" data-source="post: 396172" data-attributes="member: 4527"><p>i just weighed the new and old brake calipers/discs.</p><p></p><p>old caliper = 3.6kg (like my JUN UL flywheel)</p><p>old disc = 3.2kg</p><p>pulsar caliper = 4.6kg</p><p>pulsar vented discs = 6kg! (same as the Rota alloys) almost twice as heavy although they are technically twice the disc</p><p></p><p>the guide pin seemed to be gripping the new rubber seat too hard (no amount of grease works cos the tight fit just squeezes it out dry) prob cos the inside is slightly stretched and narrowed from the installation so i widened it abit with a 7mm drillbit till it slides smoothly. i tried various greases and most of them just get squezed dry and the guide pin just grips the rubber tube. so i tried engine oil and that works, the engine oil keeps the pin n rubber always lubed and could prob withstand and perform under high brake temps if it can withstand inside a firey engine</p><p></p><p>[ATTACH=full]31437[/ATTACH]</p><p></p><p>caliper, pads and mount fitted with clean gloves this time</p><p></p><p>[ATTACH=full]37251[/ATTACH] [ATTACH=full]29161[/ATTACH]</p><p></p><p>fitted</p><p></p><p>[ATTACH=full]37249[/ATTACH] [ATTACH=full]31438[/ATTACH]</p><p></p><p>few low shots</p><p></p><p>[ATTACH=full]37250[/ATTACH] [ATTACH=full]29162[/ATTACH]</p><p></p><p>pic of the vinyl sunstrip</p><p></p><p>[ATTACH=full]31439[/ATTACH]</p><p></p><p>whenever i took the new brakes out for bedding in, from cold the disc could be heard scrubbing against something every half turn like a really warped disc when i'm off the brake and silences when i brake. after a hard bedding in when the brakes heated up or the disc lip has worn enough paint off the inside of the caliper, the noise goes away.</p><p></p><p>took the caliper out and traced it to the disc being soo close to the caliper the slightest offset and the crusty rust at the rim made it rub against the inside of the caliper. releasing the brake to relax the caliper allows it to loosen and droop down at an angle towards the disc. when applying the brake it squeezes against the pads & disc which straightens the calipers position away from the disc.</p><p></p><p>[ATTACH=full]31440[/ATTACH]</p><p></p><p>grinded the paint off the inside face and tried to rejig the caliper mount far away from the disc as i can.</p><p>tested again and the noise is still slightly there</p><p></p><p>[ATTACH=full]29163[/ATTACH]</p><p></p><p>the scraping marks can be seen on the rusted disc lip so i grinded the rust away till smooth</p><p></p><p>[ATTACH=full]32400[/ATTACH]</p><p></p><p>success, it works quietly now <img src="data:image/gif;base64,R0lGODlhAQABAIAAAAAAAP///yH5BAEAAAAALAAAAAABAAEAAAIBRAA7" class="smilie smilie--sprite smilie--sprite13" alt=":)" title="Smile :)" loading="lazy" data-shortname=":)" /> new disc'll prob arrive tomorrow but at least i could drive to work in the morning before it comes.</p><p></p><p>screwed the brake pedal further into the master cylinder shaft cos previously just locking it via the last few threads didn't seem sturdy enough incase i brake hard and the few threads couldn't hold. this would lower the pedal range and i also bent the brake sensor bracket abit closer to the pedal</p><p></p><p>[ATTACH=full]31436[/ATTACH]</p><p></p><p>with a lower brake pedal i also lowered the accelerator by thickening the bumpstop with a bicycle brake pad ziptied to it and readjusted the throttle cable at the TB</p><p></p><p>[ATTACH=full]37248[/ATTACH]</p><p></p><p>today i recorded how the tyre pressure affects the tread patch and plotted it in excel</p><p></p><p>[ATTACH=full]52277[/ATTACH].</p><p><img src="http://img829.imageshack.us/img829/8208/58652870.jpg" alt="" class="fr-fic fr-dii fr-draggable " style="" /></p></blockquote><p></p>
[QUOTE="pollyp, post: 396172, member: 4527"] i just weighed the new and old brake calipers/discs. old caliper = 3.6kg (like my JUN UL flywheel) old disc = 3.2kg pulsar caliper = 4.6kg pulsar vented discs = 6kg! (same as the Rota alloys) almost twice as heavy although they are technically twice the disc the guide pin seemed to be gripping the new rubber seat too hard (no amount of grease works cos the tight fit just squeezes it out dry) prob cos the inside is slightly stretched and narrowed from the installation so i widened it abit with a 7mm drillbit till it slides smoothly. i tried various greases and most of them just get squezed dry and the guide pin just grips the rubber tube. so i tried engine oil and that works, the engine oil keeps the pin n rubber always lubed and could prob withstand and perform under high brake temps if it can withstand inside a firey engine [ATTACH=full]31437[/ATTACH] caliper, pads and mount fitted with clean gloves this time [ATTACH=full]37251[/ATTACH] [ATTACH=full]29161[/ATTACH] fitted [ATTACH=full]37249[/ATTACH] [ATTACH=full]31438[/ATTACH] few low shots [ATTACH=full]37250[/ATTACH] [ATTACH=full]29162[/ATTACH] pic of the vinyl sunstrip [ATTACH=full]31439[/ATTACH] whenever i took the new brakes out for bedding in, from cold the disc could be heard scrubbing against something every half turn like a really warped disc when i'm off the brake and silences when i brake. after a hard bedding in when the brakes heated up or the disc lip has worn enough paint off the inside of the caliper, the noise goes away. took the caliper out and traced it to the disc being soo close to the caliper the slightest offset and the crusty rust at the rim made it rub against the inside of the caliper. releasing the brake to relax the caliper allows it to loosen and droop down at an angle towards the disc. when applying the brake it squeezes against the pads & disc which straightens the calipers position away from the disc. [ATTACH=full]31440[/ATTACH] grinded the paint off the inside face and tried to rejig the caliper mount far away from the disc as i can. tested again and the noise is still slightly there [ATTACH=full]29163[/ATTACH] the scraping marks can be seen on the rusted disc lip so i grinded the rust away till smooth [ATTACH=full]32400[/ATTACH] success, it works quietly now :) new disc'll prob arrive tomorrow but at least i could drive to work in the morning before it comes. screwed the brake pedal further into the master cylinder shaft cos previously just locking it via the last few threads didn't seem sturdy enough incase i brake hard and the few threads couldn't hold. this would lower the pedal range and i also bent the brake sensor bracket abit closer to the pedal [ATTACH=full]31436[/ATTACH] with a lower brake pedal i also lowered the accelerator by thickening the bumpstop with a bicycle brake pad ziptied to it and readjusted the throttle cable at the TB [ATTACH=full]37248[/ATTACH] today i recorded how the tyre pressure affects the tread patch and plotted it in excel [ATTACH=full]52277[/ATTACH]. [IMG]http://img829.imageshack.us/img829/8208/58652870.jpg[/IMG] [/QUOTE]
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