Author Topic: Highway stumble/loss of power  (Read 3189 times)

Offline qwerty123

  • Posts: 71
  • I Love YaBB 2!
Re: Highway stumble/loss of power
« Reply #15 on: June 23, 2017, 06:37:17 PM »
At this very moment a cafe called "Fuel" in Llano, Tx (quite a nice little town).  The plan is Abilene tonight.

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Highway stumble/loss of power
« Reply #16 on: June 23, 2017, 06:41:35 PM »
Do you plan on being in the Denver area ??
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline qwerty123

  • Posts: 71
  • I Love YaBB 2!
Re: Highway stumble/loss of power
« Reply #17 on: June 23, 2017, 11:57:05 PM »
Yup, I do plan on passing through Denver.

A couple thoughts/data points I had today whilst riding:

--The engine oil is probably overfilled by a bit. I used the dipstick while cold, it looked too low, so I added some. Measuring warm, it's on the high side. I can see oil coming out near the airbox on both sides, dirtying my block and dripping on my boot.

--It doesn't happen at 55mph, but 60+ it does

--I tried hitting the kill switch briefly while on the road. The slowdown from just turning off the ignition is much smoother than the problem I'm trying to diagnose. This  makes me think it's something that's causing an imbalance (i.e., it's only happening on one cylinder). The sound is very different, too.

--I adjusted the valve clearances today, to 0.010 exhaust, 0.006 intake. Left cylinder was already at those settings, right was at .008 exhaust, .006 intake.

I'm going to measure coil resistance and perhaps remove a little oil tomorrow.

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Highway stumble/loss of power
« Reply #18 on: June 24, 2017, 09:17:08 AM »
There is an online site Euromoto Electric , located in the Denver area .
John Rayski is the owner great person to do business with .
He also has a BMW motorcycle shop .
May want to contact him when you get into the Denver area .
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline qwerty123

  • Posts: 71
  • I Love YaBB 2!
Re: Highway stumble/loss of power
« Reply #19 on: June 24, 2017, 10:41:42 AM »
Thanks for the tip Bob! I've done business with them before and have been nothing but satisfied. Perhaps time to pay a visit in person!

The plot thickens a bit:

I pulled off the bowls and there's a bunch of fine sediment in the left bowl...but I pulled them and the main jets and cleaned as well as I could before the trip (granted, a couple thousand miles ago at this point). But where did it come from?!? Fuel is going through the tank screen and a paper filter. Maybe I got a bunch of crap in there? Maybe it's from the lines themselves? But why then only the left bowl?

Anyway, suggestions for a side-of-the-road carb cleaning more than welcome!

Offline Justin B.

  • Administrator
  • *****
  • Posts: 5910
  • I love my Beemers
Re: Highway stumble/loss of power
« Reply #20 on: June 24, 2017, 01:44:26 PM »
Run by Ft. Worth, TX, and I'll see if I can help.  Am PMing you my phone number...
« Last Edit: June 24, 2017, 01:46:18 PM by admin »
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!

Offline qwerty123

  • Posts: 71
  • I Love YaBB 2!
Re: Highway stumble/loss of power
« Reply #21 on: June 24, 2017, 04:56:05 PM »
Thank you very much Justin! I'm much obliged,  and will keep it in mind---after a thorough-as-possible carb clean, Penelope appears to be running sweetly.  But it's also 20F cooler than yesterday!

I'm feeling pretty good about making Colorado, and so am headed to Grulla Reserve in NM. I did determine that I have an old style ECU but a newer low resistance coil,  so I'm planning to upgrade some bits with the Euromotoelectrics folks anyway.

Thanks to all here for the support, and thanks to Matt in Austin for showing me some mighty fine roads!

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Highway stumble/loss of power
« Reply #22 on: June 24, 2017, 05:35:23 PM »
Good to hear you got it sorted out, nothing worse than having issues on the road far from home .
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline mrclubike

  • Posts: 1437
  • Jungheinrich Master Tech
Re: Highway stumble/loss of power
« Reply #23 on: June 25, 2017, 09:57:20 AM »
Quote
  --I tried hitting the kill switch briefly while on the road. The slowdown from just turning off the ignition is much smoother than the problem 

I would not do this it could back fire and blow the exhaust apart :o
1982 R65 running tubeless Snowflakes
2004 R1150R

Offline mrclubike

  • Posts: 1437
  • Jungheinrich Master Tech
Re: Highway stumble/loss of power
« Reply #24 on: June 25, 2017, 10:13:21 AM »
If you get a new Ignition module
Get the heavy duty one and remember to get the adapter bracket
Keep the old one for a spare
« Last Edit: June 25, 2017, 08:42:05 PM by Mrclubike »
1982 R65 running tubeless Snowflakes
2004 R1150R

Offline Bob_Roller

  • Global Moderator
  • *****
  • Posts: 8923
  • ? GMT -7 Hours
Re: Highway stumble/loss of power
« Reply #25 on: June 25, 2017, 02:15:16 PM »
The mounting bracket states that it is needed if your ignition module is mounted on top of the frame .

Was the ignition module moved on later model year bikes ??
« Last Edit: June 25, 2017, 02:15:34 PM by Bob_Roller »
'81 R65
'82 R65 LS ?
'84 R65 LS
'87 Moto Guzzi V65 Lario
'02 R1150R
Riding all year long since 1993 .
I'll give up my R65, when they pry my cold dead hands from the handlebars !!!!!

Offline Justin B.

  • Administrator
  • *****
  • Posts: 5910
  • I love my Beemers
Re: Highway stumble/loss of power
« Reply #26 on: June 25, 2017, 03:55:43 PM »
John also sells a nice adjustable voltage regulator, as long as you're there...
Justin B.

2004 BMW R1150RT
1981 R100RT - Summer bike, NEKKID!!!

Offline qwerty123

  • Posts: 71
  • I Love YaBB 2!
Re: Highway stumble/loss of power
« Reply #27 on: June 25, 2017, 05:27:59 PM »
Yeah, I may just pony up for the enhanced ignition kit (now the question is do I get the charging system at the same time, since the timing sensor is specific to each alternator...but the combo is 1/3 the cost of the bike!)

Offline wilcom

  • Posts: 1485
Re: Highway stumble/loss of power
« Reply #28 on: June 25, 2017, 06:57:17 PM »
Quote
.but the combo is 1/3 the cost of the bike!

Certainly makes you stare at the menu for awhile when ordering , huh?  :-/
Joe Wilkerson
Telephone man with a splash of Data
Menifee, CA

Present:
1984 BMW R65LS "Herr Head"
1982 BMW R65LS 
past:
1979 R65
1980 R65
1982 R80RT
1974 R90/6
1972 R75
1964 R50/2
19xx R27
ZX-11

Offline mrclubike

  • Posts: 1437
  • Jungheinrich Master Tech
Re: Highway stumble/loss of power
« Reply #29 on: June 25, 2017, 08:51:21 PM »
Quote
The mounting bracket states that it is needed if your ignition module is mounted on top of the frame .

Was the ignition module moved on later model year bikes ??

The new heavy duty IGN MOD is larger than the earlier ones and the mounting bolts are wider apart
So it has to be mounted at a angle to the top tube instead of perpendicular
1982 R65 running tubeless Snowflakes
2004 R1150R