Page 2 of 2 FirstFirst 12
Results 21 to 39 of 39

Thread: full bike check

  1. #21
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    I'm assuming the voltage is incorrect so the motor is being burnt out, I have a voltage reader arriving tomorrow to confirm if this is the cause.

  2. #22
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Both terminals measure at 11.20 volts. I'm stumped, something is seizing the fans within such a short amount of time

  3. #23
    Baby Twin andreas's Avatar
    Join Date
    May 2011
    Posts
    90
    It's true, in the case of electric motors, that the lower the applied voltage, the higher the current drawn. But, even with 11.2v (which is suspiciously low - should be 13-ish) that would not cause the motor to fail. The fan units are (in IMHO) pretty cheap and crappy - but, even so. What does send the drawn current skywards is any form of additional load on the fan - either by physical friction (blades hitting the housing, for example), or drag in the motor bearings - the shaft runs in sintered bushes that release, or should release, lubricant as required - wouldn't hurt to try a drop of light oil. I'd be running a prolonged bench test on the fans before refitting to the bike. The one fan I had fail on me had overheated to the point that the motor housing had melted - I assume because of dry bearings, but I can't prove that. Going back to the 11.2v - how old is your battery?

  4. #24
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    I haven't checked the battery, I only picked the bike up 2 weeks ago but I'll see tomorrow. I think I've found the cause of the seizing fan on your suggestion on the physical friction overloading the fan, as the fan itself is not the issue as I had replaced it, so I had a closer inspection of the radiator and it's left hand side top section is slightly bent downwards, how does that happen? can only think it must have been in an accident. I'll switch my only working fan onto the left and rotate it to see if there's any friction tomorrow but I'm 90% sure that's the problem. Another thing to replace

  5. #25
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Hard to tell without having a freely spinning fan to test it but the bracket the fan sits onto was a few mm out, so the fan must have been slightly in contact with the radiator. I've forced the bracket out further and hopefully the new fan arrives Tuesday. That should be it, much cheaper than replacing the whole radiator, despite it being bent I don't have the funds to just keep replacing things on this bike anymore.

  6. #26
    Baby Twin andreas's Avatar
    Join Date
    May 2011
    Posts
    90
    Blimey! Bent radiator sounds like a drop . . . look on the bright side though - it doesn't leak . . . or does it? You mentioned that the previous owner had run it dry? Ordinarily, coolant levels do not drop. Keep an eye on the level! Do whatever you have to do to ensure the LH fan spins freely - then all should be well.

    Battery - On any vehicle, especially high compression big twins, the battery is the life and soul of the party. I've fitted a Motobatt (AGM - big CCA) to mine - you have to modify the retaining clamp a bit - but the difference is amazing.

    As I said before, once sorted, they're great bikes - and, once again, make sure you see Griff . . .

  7. #27
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    It doesn't appear to leak, the damage doesn't seem to be too bad either. The prior owner just stuck to the service schedule and did nothing himself inbetween, so he was running it dry with only 1 fan working. It's booked in with Aprilia peformance but not until late next month. I wonder what brilliant problem I will find next week. I'll get that Motobatt on order, thanks for the suggestion
    Last edited by HairyHarry; June 15th, 2014 at 12:25 PM.

  8. #28
    Baby Twin andreas's Avatar
    Join Date
    May 2011
    Posts
    90
    Great! Let's hope you have no further problems . . .

  9. #29
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Well that's the fan sorted, still running well after a long ride. I'm not attaching both sides of the fan to the radiator, this allows clearance for the fan to run. I'll replace the radiator some other time!

    So next on the list is the slipping clutch. Hopefully that will be fixed tomorrow with an oil change, also I'm putting that Motobatt battery in

  10. #30
    Baby Twin andreas's Avatar
    Join Date
    May 2011
    Posts
    90
    Here's how I did it. The spacer measures 100 x 20 x 10mm. The bolts are M5x30. The clamp presses forwards as the bolts tighten. My first attempt was a much deeper spacer and longer bolts to allow the clamp to sit 'properly' on the top edge of the battery, but, because of the angle of the captive bolts, that didn't work - (the clamp moves away from the battery). You could of course design a completely new clamp - but this works fine for me! Apologies for the photographic quality!


    Aprilia battery clamp 19 Jun 14 002.JPGAprilia battery clamp 19 Jun 14 003.JPG

  11. #31
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Brilliant, if it works for you I'll do the same for my battery. Thanks especially for the bolt/spacer dimensions

  12. #32
    Superbike Twin ride4fun's Avatar
    Join Date
    Oct 2009
    Location
    Hertfordshire
    Posts
    195
    What's the significant advantage of fitting one of these batteries, and how much do they cost?

  13. #33
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    I picked mine up for 49.95, AGM batteries can be left dormant for longer without having to trickle charge, and have a higher crank than a standard battery

  14. #34
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Well the oil change made a HUGE difference to the bike. Clutch isn't slipping, performance is tons better ( Castrol 10w40 )

    The front shudders slightly with harsh braking, probably a slightly warped disc..?

  15. #35
    Superbike Twin ride4fun's Avatar
    Join Date
    Oct 2009
    Location
    Hertfordshire
    Posts
    195
    Quote Originally Posted by HairyHarry View Post
    I picked mine up for 49.95, AGM batteries can be left dormant for longer without having to trickle charge, and have a higher crank than a standard battery
    What improvement have you noticed, if any?

  16. #36
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    I believe my replaced battery was on it's way out so I can't compare it with an old battery

  17. #37
    Baby Twin
    Join Date
    Oct 2010
    Location
    Near Lancaster
    Posts
    54
    Quote Originally Posted by HairyHarry View Post
    Well the oil change made a HUGE difference to the bike. Clutch isn't slipping, performance is tons better ( Castrol 10w40 )

    The front shudders slightly with harsh braking, probably a slightly warped disc..?
    More likely to be seized bobbins on the brake carriers, they sometimes sieze and you get same feeling as warped disc. Try cleaning them off with brake cleaner and make sure they all rotate freely, hopefully that will cure it.

  18. #38
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    Hopefully an easy fix then, thanks for your help alwaduk. Bikes nearly back to how it should be

  19. #39
    Baby Twin
    Join Date
    May 2014
    Location
    UK
    Posts
    25
    You were right, a few bobbins were seized learning quite a lot of things in such a short amount of time on this bike

Page 2 of 2 FirstFirst 12

Similar Discussions

  1. Check this out
    By spoonz in forum Aprilia RSVR
    Replies: 43
    Last Post: December 4th, 2009, 03:51 AM
  2. please check these on your bike!!
    By fusebox in forum Aprilia RSVR
    Replies: 22
    Last Post: October 29th, 2009, 01:31 PM
  3. Check this Beast of a bike!
    By JayB in forum Motorcycle Talk
    Replies: 6
    Last Post: November 8th, 2008, 04:28 AM
  4. 04 Akra full system on 06/07 bike
    By mkw007 in forum Aprilia RSVR
    Replies: 0
    Last Post: July 26th, 2008, 12:59 AM

Tags for this Thread

Posting Permissions

  • You may not post new threads
  • You may not post replies
  • You may not post attachments
  • You may not edit your posts
  •