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Long trip preparation inquiry
- San Arthur
- Posts: 577
- Joined: Sun Apr 22, 2007 2:08 pm
- Location: San Antonio, TX.
- Has thanked: 1 time
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Itinerary and a question for you all.
Which do you recommend I take, what sizes do you think would be more critical or which ones would be very difficult to replace while on the road?
Since this is my first long trip on the R26, m I already over reacting?
ITINERARY
Saturday October 1 / 116 miles
From Vanderpool to Del Rio
Go 337 thru Leakey to Camp wood, south on 55 and turn right on FM334, into Brackettville and then head west on 90 to Del Rio.
Sunday October 2 / 203 miles
Del Rio to Alpine.
Ice cream stop at Judge Roy Bean’s in Langtry, lunch and gas up in Sanderson.
Monday October 3 / 120 miles
Alpine to Balmorhea
Breakfast in Alpine then to Fort Davis and up to the McDonald Observatory for a roll-down, backtrack to Fort Davis for lunch then continue on scenic TX-17 through Wild Rose Pass to Balmorhea.
Tuesday October 4 / 160 miles
Balmorhea to Marfa
Ride scenic TX-17 back to Fort Davis, then ride the Davis Mountain Loop , back to Ft Davis for lunch and continue on to Marfa.
Wednesday October 5 / 110 miles
Marfa to Lajitas
Down through the Shafter ghost town to Presidio for lunch then ride River Road 170 to Lajitas.
Thursday October 6 / 100 miles
Lajitas to The Chisos Basin.
Ride the Big Bend Park and then up to the Basin.
Friday October 7 / 80 miles
Chisos Basin to Marathon.
Saturday October 8 / 300 miles
Marathon to Vanderpool.
'58 R26 '76 R90S '88 R100RS '94 R100GS/PD
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
- Has thanked: 3 times
- Been thanked: 34 times
Your last leg from Marathon
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
Love this post
Friend of the Marque, Co-Founder VBMWMO (1972)
http://bmwdean.com --- http://bmwdean.com/slash2.htm[/h3]
[img]http://bmwdean.com/r75-200.jpg[/img]
- San Arthur
- Posts: 577
- Joined: Sun Apr 22, 2007 2:08 pm
- Location: San Antonio, TX.
- Has thanked: 1 time
- Contact:
Test ride # 1 and help, again....
(I used a GPS to measure the speed).
It runs a little faster and accelerates easier without the filter. I’m thinking on stuffing a paper filter inside the air box. Do you have any suggestions?
I can barely do 58 mph down hill and with tail wind!
I can cruise at 40 mph with ease, but shouldn’t I get a little more out of her?
Is this the normal speed for a R26?
I checked the final drive ratio, is 4.16 and the stamped number on the gearbox is 25/6.
I haven’t checked the flywheel revolution versus the rotation of the gearbox output flange but as soon as I can convince my wife to help me count in a 99F+ garage I’ll do it; unless you know a way of doing this by myself.
My tires are 3.50s, what if a change both for a set of 3.25? On the internet 3.50 look taller then the low profiles I did installed.
If I change the tires I will true the rims, they wobble a little.
The sparkplug shows a normal mixture, should I make it richer?
Any ideas and suggestions would really be appreciated.
'58 R26 '76 R90S '88 R100RS '94 R100GS/PD
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
- Location: San Antonio, TX
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That speed seems a bit slow
The specs call for 3.25x18 tires front and rear. If the diameter were bigger on the 3.5 tires, then for any given engine RPM, you would actually be doing a faster ground speed...the engine might have trouble pulling that due to the increased torque. It could be that the larger diameter tires are cutting down on the top end speed. I would run stock tires...I'd also run stock filtration.
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
- Bruce Frey
- Posts: 536
- Joined: Fri Oct 27, 2006 3:00 am
A 6/25 (4.16) rear gear is
You can check it yourself by putting it in neutral and counting the driveshaft revolutions when you rotate the rear wheel by hand one revolution. Save your wife points for when you really need help;-). (I spent all day in my Houston garage putting my R12 back together. It was hot!)
Maybe a previous owner put in sidecar gears.
I'll guess your tire rolling diameter is 66cm (measure it x 3.1416) which gives a rolling circumference of about 2.07m. If you have a 6/25 and do 58mph (94kph), you are turning about (94000/60 = 1576m/min / 2.07 = 757 wheel rpm x 4.16 x 1.54 =) 4849 engine rpm. In this case you are definitely down on power.
Your rated horsepower is at 6400 rpm.
If you have sidecar gears, however, your rpm would be 6132. In this case you are right about where you should be.
Check it out.
Bruce
- San Arthur
- Posts: 577
- Joined: Sun Apr 22, 2007 2:08 pm
- Location: San Antonio, TX.
- Has thanked: 1 time
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Pi = 3.1415926535....
I'm a little concern about the top speed and will make some research on what I have on the bike. I’ll post the information latter.
I talked to my mechanic, Perry Bushong and he gave me some homework.
We order a new set of Heindenau 3.25- 18 tires, the profile is taller.
I don’t expect to gain a lot but anything counts, especially over a 1,200 mile trip.
I’m going to be counting the revolution with another method and checking the position of the speedo needle at 80 km/h against the GPS.
If I can reach 66 mph I’ll happy.
I would appreciate if any of the local R26 owners could ride with me to compare gears, final drive, etc. If you can, please pm me. I live in North Central San Antonio, Texas.
Since I don’t expect to be the fastest motorcycle around I better go in style.
I have never use my Davida “pudding bowl” helmet and aviator goggles for more than a few hours at a time. I know full face helmets are safer.
If any of you have used them in a long ride I would appreciate the input too.
Thanks
'58 R26 '76 R90S '88 R100RS '94 R100GS/PD
- San Arthur
- Posts: 577
- Joined: Sun Apr 22, 2007 2:08 pm
- Location: San Antonio, TX.
- Has thanked: 1 time
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Bad news, low psi
To make a long story short tomorrow I'm towing Zenaida to Fort Worth to visit my mechanic.
I’ll let you know.
Thanks
'58 R26 '76 R90S '88 R100RS '94 R100GS/PD
- schrader7032
- Posts: 9050
- Joined: Fri Oct 27, 2006 3:00 am
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What should pressure be? Did
'78 R100/7 '69 R69S '52 R25/2
Fast. Neat. Average. Friendly. Good. Good.
- San Arthur
- Posts: 577
- Joined: Sun Apr 22, 2007 2:08 pm
- Location: San Antonio, TX.
- Has thanked: 1 time
- Contact:
Zenaida in Fort Worth
We took the tank off to adjust the valves but in the process we found a bad wheel bearing and a broken spoke that need to be fix.
I took the carb off, and only got 80psi with a cold engine.
I bought Zenaida in Mexico City almost 21 years ago.
Every time we open or work on a new component we discovered the ingenuity used by previous "mechanics" forced to work without original parts.
Many parts inside Zenaida were machined or transplanted form other motorcycles, not always BMW.
My mechanic says that there is a possibility the the piston belongs to another model. He will measure it against the other R26 he has at the shop.
We couldn't find any signs of a sick engine, everything, but the compression checks.
He suspects the cylinder might be shorter.
Is this possible, what do you think.
Here is Zenaida on her way to Fort Worth
How many Dos Equis you need to take the wheel off??
I hate and love my old bikes!
'58 R26 '76 R90S '88 R100RS '94 R100GS/PD