New bike, hot start problem

neilmac

Joined Oct 2010

141 Posts | 0+

Strontian

Discussion Starter
• Sep 8, 2015

• #1

Took the new V4 out today. Quick lunchtime run to Ardgour, 14 miles. Had a drink, went to start the bike and it wouldn't start. I'd read about the hot start problems, so immediately assumed it was that. Left it for 15 mins, still wouldn't start. Had to get a jump start. Rode it back, stopped it, and tried again, dead. I've got the battery out, and it's on an optimiser. Looking into beefing up the earth connection as suggested elsewhere. Dealer said he had replaced one other bike's starter motor last year. I can't believe this hot start thing is still going on, starting to wish I had my old gen 2 back, it never let me down. Anyone else manage to fix this with just the earth cable upgrade?

 

Robbie

Joined Jul 2014

279 Posts | 19+

North Shields

• Sep 8, 2015

• #2

Doesnt sound like a hot start issue, sounds like your battery is caput

 

4vr

Joined Aug 2014

270 Posts | 18+

manchester

• Sep 9, 2015

• #3

worst of all piagio say hot start issue doesnt exsist, as is the myth that they have never had a valve out of spec before the mythical 12k service!!!!

 

alexrsv4

Joined Jul 2015

20 Posts | 4+

athens,greece

• Sep 9, 2015

• #4

It's too early to have a hot start issue and i think in Scotland the temperatures are not too high.
If your battery has proper load ratings (check the amperage with a multimeter) look for a problem with the wiring contacts on the battery ,maybe an electrical leakage from the alarm system or bad contact in the stand-gearbox switch sensor.
Anyway I think it was probably a coincidence and you must not worry about the reliability of the T- V4
.....good luck..

 

Rizla

Joined Sep 2013

928 Posts | 75+

East Scotland

• Sep 9, 2015

• #5

Doesn't sound like hot start. It sounds like either your battery is fubar or your charging system is not working correctly.

Stator burning out is another known issue I'm afraid.

I know cos I just changed mine two weeks ago.

 

shotgun

Joined Oct 2010

698 Posts | 23+

burnham on sea

• Sep 9, 2015

• #6

I think its just **** batteries that Aprilia are using , mine had this issue but once I changed the battery for a decent one .... no more problems

 

Rizla

Joined Sep 2013

928 Posts | 75+

East Scotland

• Sep 9, 2015

• #7

jump start it and measure the voltage at the battery on tickover and at 5k rpm.

When my stator fired itself I was only getting 12.2v at tickover and 12.3v at 5k.

With new stator, regulator / rectifier installed I get 14.5v at tickover.

 

Stampy

Joined Mar 2014

105 Posts | 14+

NZ

• Sep 9, 2015

• #8

Mine was a new 12, I was suffering HSI too, battery was 3 yrs old when I bought it new anyway so I swapped it out and fitted a volt meter, least now I know when my stator is fried.

 

Attachments

• 
  P1020004.JPG

  88.7 KB
• 
  P1020005.JPG

  74.1 KB
• 
  P1020006.JPG

  90.6 KB

neilmac

Joined Oct 2010

141 Posts | 0+

Strontian

Discussion Starter
• Sep 11, 2015

• #9

Voltages are OK, 14.3 @ 4000 rpm. Left it on an Optimate 4 and it seems OK, but I still don't trust it. Will have to do a few trips over the ferry to gain confidence in it again.

 

Rizla

Joined Sep 2013

928 Posts | 75+

East Scotland

• Sep 11, 2015

• #10

neilmac said:

Voltages are OK, 14.3 @ 4000 rpm. Left it on an Optimate 4 and it seems OK, but I still don't trust it. Will have to do a few trips over the ferry to gain confidence in it again.

Click to expand...

That's a good output.

Must be battery then.

 

neilmac

Joined Oct 2010

141 Posts | 0+

Strontian

Discussion Starter
• Sep 11, 2015

• #11

I called the dealer, and he's sending up a new battery. Great service from Mo-Tech.

 

Stampy

Joined Mar 2014

105 Posts | 14+

NZ

• Sep 12, 2015

• #12

Good stuff! :thumbup

 

bash62

Joined Jun 2013

180 Posts | 20+

barry south wales uk

• Sep 13, 2015

• #13

i did 25 miles on mine and it cut out.was the stator..they changed the bike