The New And Improved Unofficial R65 Forum V2

Technical Discussion => BMW Technical Q&A, Primarily R65 => Topic started by: Ctino on January 28, 2013, 12:20:33 PM

Title: R90 Tank fitment help.???
Post by: Ctino on January 28, 2013, 12:20:33 PM
Hi, i bought an r90 tank from the Netherlands on ebay and was wondering if anybody here has done it. Also what they used as a rear mount and where they moved the electrics. So far ive angle grinded all the electic mounts off of the frame!!!!!!
Any help much appreciated
Title: R90 Tank fitment help.???
Post by: Justin B. on January 28, 2013, 12:51:08 PM
[movedhere] General Announcements [move by] Justin B..
Title: Re: R90 Tank fitment help.???
Post by: montmil on January 28, 2013, 02:13:43 PM
Oh Boy! More bedspreads!
Title: Re: R90 Tank fitment help.???
Post by: tvrla on January 29, 2013, 12:20:04 AM
That's the wrong tank for this application. I believe the 86-95 airheads have the tank that will fit without a bunch of modifications.

Now you've got the problem of relocating the electrics plus modifying the mounts. The R90 had all the electrics in the headlight, so it's a good question where they'll go now.
Title: Re: R90 Tank fitment help.???
Post by: steve hawkins on January 29, 2013, 02:00:18 AM
As mentioned above, you are now going to have to fabricate the R90 frame mounts.  And relocate all your electrics - Having said that you should still have some room under there as you do not have an under the tank master cylinder and all that gubbins.

I personally would not go down the route of having all your electrics in the headlight - especially if any sort of nose fairing is being considered.

Good luck.

Rev. light
Title: Re: R90 Tank fitment help.???
Post by: livingdeadhead on February 04, 2013, 09:44:13 AM
same colour as my vw passat!
Title: Re: R90 Tank fitment help.???
Post by: Session101 on February 04, 2013, 06:32:07 PM
(https://bmwr65.org/smf/proxy.php?request=http%3A%2F%2Fillusion.thepit.org%2F%7Enyteaire%2Fgarage%2FUrsula%2Fleft.jpg&hash=d06cab8de3ed39812cb2b06da0e43f7869e3b405)

looks sweet when you figure it out
Title: Re: R90 Tank fitment help.???
Post by: MR.E on February 06, 2013, 12:57:24 PM
CafeRR

Have you still got the side panels on the bike, the little R65 ones?
If so make a plate to mount behind one of the panels and mount the electrics there above the battery, i'll post a pic later tonight of what i mean, plus you'll have easy access to the electrics.

Hope it helps
Title: Re: R90 Tank fitment help.???
Post by: MR.E on February 06, 2013, 12:59:38 PM
or run filters on the carb (as in above pic) and put the electrics in the redundant airbox
Title: Re: R90 Tank fitment help.???
Post by: Ctino on February 13, 2013, 07:36:00 AM
Cheers for the reply's lads.
Im gonna try takle the electrics also the mounting of the tank this evening. I am still stumped as to what to do, i was thinking of putting the electrics underneath the fiberglass seat. But a bit of fiddling around with the wires and mounting!!!! Will check back when i figure it out
Title: Re: R90 Tank fitment help.???
Post by: littledave on February 22, 2013, 02:40:36 PM
hi i am busy doing the same as u and fitting a r90 tank to a r65 i have moved all the relays and fuses to the seat hump and also the batt but the coil ,voltage regulator and something else have fitted under the tank with a little juggeling but its not to bad a job
Title: Re: R90 Tank fitment help.???
Post by: Ctino on February 23, 2013, 06:42:27 AM
I finally figured out a solution i am happy with.
The tank mounting was pretty easy tbh i got some thick rubber hose and sliced it down the middle to fit the front mounting point. Then for the rear mount got a bit creative lol.... i used a 50mm bolt lock with spacers and the original retaining loop. Actually works really well everything fits well with no movement.
Then the electrics were a bit more tricky. I put the starter relay and flasher relay upside-down, just under the frame. The voltage regulator was relocated under the seat, just had to extend 4 wires. The ignition control unit is mounted where the coil was mounted.

As for the coil i relocated it near the end of the tank. I want to change the coil as it is very bulky, i was looking at some dynatek minicoils. Does anyone know the primary resistance of the original boshe coil is??

Cheers for the replies......