The BSA A7-A10 Forum

Technical => A7 & A10 Engine => Topic started by: a10 bobber on 25.08. 2013 09:41

Title: extended sump studs
Post by: a10 bobber on 25.08. 2013 09:41
Hi, I have bought an alloy sump plate and have now realised I need extended studs or bolts.
Any idea where to get them please?
Title: Re: extended sump studs
Post by: morris on 25.08. 2013 13:51
You should be able to get them where you bought the plate, but if not, have a look here;
http://www.degroot-bsa.nl/product_info.php/products_id/1203
Title: Re: extended sump studs
Post by: A10 JWO on 25.08. 2013 15:12
These are normally made by SRM unless it is a copy. Mine came with allen bolts from SRM who are a great company. They have a huge website and are very helpful. Try them ?

Colin
Southend
Title: Re: extended sump studs
Post by: marathonpaul on 25.08. 2013 15:44
And actually, SRM now sends Allen bolts with the correct threads.

$.02

Paul
Title: Re: extended sump studs
Post by: a10 bobber on 25.08. 2013 15:49
Cheers guysB-)
Title: Re: extended sump studs
Post by: terryg on 25.08. 2013 19:09
It's worth considering some rod (maybe stainless) and a couple of the appropriate dies (and stock) = studs whenever you need them, with a bit of practice.
Title: Re: extended sump studs
Post by: muskrat on 25.08. 2013 21:17
I think the ones on the degroot link are standard length and wrong thread, should be bsw/cei.
I made my own studs 1-1/4" long with 1/2" of whit thread and 3/8" of cei thread.
If using cap head screws, would need to be 7/8" to 1" lomg whit thread.
Cheers
Title: Re: extended sump studs
Post by: duTch on 26.08. 2013 07:25
DraganFly have/had a supply that were reasonably easy to peruse on their website, but it seems they've changed it all and made it impossible to use,but if you type "studs', and a size you may find what you want. Also try 'Catalogues'
 Otherwise just Try Lightning Spares or do a gaggle search

 Sorry can't help more
      Cheers, duTch
Title: Re: extended sump studs
Post by: morris on 26.08. 2013 08:05
I think the ones on the degroot link are standard length and wrong thread, should be bsw/cei.
Quite right Musky, didn't look well enough (typed the message on a smartphone)
They do sell the right ones, but only in a kit together with the sump plate.
Title: Re: extended sump studs
Post by: bsa-bill on 26.08. 2013 10:31
Lyford Classics do the sump plate so should do the studs also, probably most of the usual traders will have them
Title: Re: extended sump studs
Post by: BSA_54A10 on 29.08. 2013 10:24
I usually go to a boating shop & buy some Whitworth bolts in stainless.
Cut off the head & tap to CEI and you are done.
Funny enough stainless bolts are usually cut into the correct size rod where as plain steel blts are roll formed from thinner tube.
Title: Re: extended sump studs
Post by: duTch on 29.08. 2013 14:46

 Yeah Trev,
 I've done a lot of that too, and don't want to split hairs, but it's worth keeping in mind that a lot of bolts that are sold as Whitworth, are actually UNC, in most cases doesn't matter, but when the thread form is important, it does matter.....WW=55˚/UNC=60˚
 
The way I see it, it's not a true Whitworth (bolt)unless it takes a Whitworth spanner- eg; WW 5/16" bolt =1/4"ww spanner, UNC 5/16"= 1/2" spanner (A/F)...am I wrong.??

 cheers, duTch
Title: Re: extended sump studs
Post by: a10 bobber on 29.08. 2013 20:43
Ok chaps, i have searched and searched and cannot find extended studs or bolts.
 I am a total novice at this stuff but really enjoy sorting the problems and making the bike my own.
 Could somebody please post the exact bolt type i require to fit the plate.Just the exact thread type and length please.As i intend to replace the studs with bolts.
 Thank you for your patience.
 Regards Paul.
Title: Re: extended sump studs
Post by: muskrat on 29.08. 2013 21:34
G'day Paul.
1/4" BSW x 1" long allen head screws. Use a thread sealant and spring washers. Be careful with the case threads, they will strip out if you over tighten the screws.
Studs are the better option. 1/4" x 1-1/4" long with 1/2" of BSW thread and 3/8" of CEI (cycle 26 tpi) thread. There's not a lot of room to get a spanner on the nuts so I use the extended tappet cover nuts.
Cheers
Title: Re: extended sump studs
Post by: a10 bobber on 30.08. 2013 08:25
Perfect muskrat.thank you  *smile*
Title: Re: extended sump studs
Post by: a10 bobber on 03.09. 2013 20:16
Got these off ebay *smile*
http://www.ebay.co.uk/itm/290919629364?var=590129394257&ssPageName=STRK:MEWNX:IT&_trksid=p3984.m1497.l2649#ht_2286wt_1255
Title: Re: extended sump studs
Post by: chaterlea25 on 04.09. 2013 19:56
Hi All
These guys do a good range of studs / bolts and lots more kits for different makes including BSA
Good quality too

http://www.motalia.com/Html/stainless_cats.html

HTH
John
Title: Re: extended sump studs
Post by: muskrat on 04.09. 2013 21:16
 And nice people to deal with. I've got quite a few of their products over the years. Only ever one problem with the crank case stud kit and were quick to rectify.
Cheers
Title: Re: extended sump studs
Post by: RoyC on 15.04. 2017 15:50
G'day Paul.
1/4" BSW x 1" long allen head screws. Use a thread sealant and spring washers. Be careful with the case threads, they will strip out if you over tighten the screws.
Studs are the better option. 1/4" x 1-1/4" long with 1/2" of BSW thread and 3/8" of CEI (cycle 26 tpi) thread. There's not a lot of room to get a spanner on the nuts so I use the extended tappet cover nuts.
Cheers

Sorry to resurrect this old post.
I have ordered some 1/4 whit bolts which I can cut off and thread the plain shank part.
What size CEI die do I require ?
Title: Re: extended sump studs
Post by: JulianS on 15.04. 2017 16:02
1/4 x 26tpi CEI (60 degree angle), but 1/4 x 26 tpi BSF (55 degree angle) will be virtually the same and nuts interchangable.

You will likely find some nuts sold as 1/4 CEI are actually 1/4 BSF and not notice any difference between them.

Title: Re: extended sump studs
Post by: RoyC on 15.04. 2017 18:00
1/4 x 26tpi CEI (60 degree angle), but 1/4 x 26 tpi BSF (55 degree angle) will be virtually the same and nuts interchangable.

You will likely find some nuts sold as 1/4 CEI are actually 1/4 BSF and not notice any difference between them.

Thank you Julian, I will order a 1/4 CEI die now.
Title: Re: extended sump studs
Post by: ralph on 15.04. 2017 19:33
Hello Roy, might these do      ebay No   112349075488

only prob is they are stainless
Title: Re: extended sump studs
Post by: chaterlea25 on 15.04. 2017 19:40
Hi all,
Thats a Motalia listing

John
Title: Re: extended sump studs
Post by: ellis on 15.04. 2017 20:24
I buy rocker cover studs for the alloy sump . They are the correct thread and length.     *good3*

ELLIS
Title: Re: extended sump studs
Post by: muskrat on 15.04. 2017 20:37
The extended nuts for the tappet covers are better than normal nuts, easier to get a spanner on.
Cheers
Title: Re: extended sump studs
Post by: edboy on 15.04. 2017 21:07
i ve had lousy experiences using the small bsw/cei studs as the plain shank can be turned into the alloy housing and break it when tightening up the nut. your choice but i use bsw studding , nuts, spring washers and loctite.
Title: Re: extended sump studs
Post by: RoyC on 15.04. 2017 21:16
Hello Roy, might these do      ebay No   112349075488

only prob is they are stainless
I have ordered a set, I'll give them a try.
Ordered some rockerbox nuts as well.
Title: Re: extended sump studs
Post by: ellis on 16.04. 2017 19:35
Well done Roy, Let us know how you get on. A drop of Loctite nut lock on the studs will keep the studs in place and spring washers on the nuts.   *good3*

ELLIS
Title: Re: extended sump studs
Post by: RoyC on 16.04. 2017 20:46
Well done Roy, Let us know how you get on. A drop of Loctite nut lock on the studs will keep the studs in place and spring washers on the nuts.   *good3*

ELLIS
Will do.