DOT5 to DOT4? Radial brake questions
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Road Captain
Joined: Jun 2014
Posts: 508
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From: California
DOT5 to DOT4? Radial brake questions
Bought a set of R6 radial calipers that the former owner had converted to DOT5. I'm running DOT4 on my Dyna. Thought I could just flush the calipers with denatured alcohol & then DOT4, but I've read sources that say switching from 5 to 4 could be a disaster. Of course several sources say I should rebuild just to be safe.
The calipers are off a 2017 and rebuild kits are limited & pricey. Basically waiting for the rebuild kit would take my bike outta commission for two weeks. Also for the price of the rebuild kit (about $75) I could buy rebuilt calipers for not that much more. But I've already bought these. SO that being said, looks like I have the following options:
Option 1: flush calipers with denatured alcohol & DOT4, bleed and hope for the best.
Option 2: flush entire system with denatured alcohol and convert to DOT5 (seems I would not need to rebuild the master to convert from 4 to 5)
Option 3: rebuild calipers
Option 4: buy new calipers
Any advice appreciated!!!
The calipers are off a 2017 and rebuild kits are limited & pricey. Basically waiting for the rebuild kit would take my bike outta commission for two weeks. Also for the price of the rebuild kit (about $75) I could buy rebuilt calipers for not that much more. But I've already bought these. SO that being said, looks like I have the following options:
Option 1: flush calipers with denatured alcohol & DOT4, bleed and hope for the best.
Option 2: flush entire system with denatured alcohol and convert to DOT5 (seems I would not need to rebuild the master to convert from 4 to 5)
Option 3: rebuild calipers
Option 4: buy new calipers
Any advice appreciated!!!
HDF Community Team
Joined: Aug 2018
Posts: 3,087
Likes: 1,246
From: New Hampsha
Option 1 will probably work. If you're skeptical, or ****, take the pistons out of the housings, split the housings if applicable, and clean everything with alcohol. Reassemble with red rubber grease. Install and use DOT 4 (or whatever is in your master now.)
Last edited by John CC; Sep 10, 2019 at 11:32 AM.
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Ozark Joe
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