TRX250R.ORG

Workshop => Body and Controls => Topic started by: rough250r on May 10, 2014, 12:41:42 PM

Title: rear caliper
Post by: rough250r on May 10, 2014, 12:41:42 PM

Any one know what size tap and thread pitch is used on the pins that the brake pads slide on is by chance? Previous owner striped out the Allen head so I'm gonna try drilling and tapping it so I can get some new pads  on there..Bellow is the part I speak of
Thanks!(http://forums.trx250r.org/vbulletin_imports/314_1934_2017-04-18_6242.jpg)

Title: rear caliper
Post by: sanddad21 on May 10, 2014, 05:39:24 PM

dont tap it to the next size. thoes pins wear out and you will fight it for as long as you have the caliper. ask around maybe some one has a extra one they will give you thats in good shape

Title: rear caliper
Post by: rough250r on May 10, 2014, 06:59:31 PM

Thanks sanddad,  My thought process behind the whole shebang is drill out the pin just inside of the threads and run a tap through to clean out the remnants of the old caliper pin, hopefully leaving me with the standard size threaded hole .  I figured I'd give it a shot and if it doesn't work out I'd just grab a new one ... We shall see

Title: rear caliper
Post by: The_Steve_Man on May 10, 2014, 08:16:27 PM

Have you tried and an extractor?

Title: rear caliper
Post by: KASEY on May 10, 2014, 09:30:28 PM

THOSE PINS ARE STAINLESS STEEL,,,   be careful,, better have GOOD bits and tap!!

Title: rear caliper
Post by: rough250r on May 10, 2014, 10:47:56 PM

Yep tried a extractor with no luck.. Couldn't get it to bite...tried a bit of heat as I was gonna rebuild it anyways... Tried
Wd-40 pb blaster as well as marvel mystery oil for about a month prior to my last ditch effort of drilling.  I'd did get it drilled out though.  Threw it in my drill press and went at it very slowly!  I drilled it out so I have to only remove about 1/32 of material when it tap it, plus the depth of the thread... Guess I'll see how she goes once I get my hands on the appropriate tap! I'm sure the stainless won't be much fun but I don't think I'll be taking much material out...

Title: rear caliper
Post by: rk88r on May 11, 2014, 09:21:11 AM

You'll need a 10x1.00 tap. I just did one the same way. Go slow with the tap and pick out bits out of the threads. It didn't turn out perfect but it'll do.

Title: rear caliper
Post by: sanddad21 on May 11, 2014, 07:59:09 PM

oh ok. im sorry i thought you were talking about tapping the caliper out to the next size. my bad.  had any luck with it today

Title: rear caliper
Post by: rough250r on May 11, 2014, 10:10:16 PM

Good to hear some wine else did this as well..no dice on getting it dine today, my metal working buddy cane over to work on some other stuff and forgot his tap set... sucks because I also need my peg done as well