Author Topic: 1971 R5 repairs  (Read 2483 times)

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Offline DaveHunter

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  • Location: New England USA
Re: 1971 R5 repairs
« Reply #45 on: June 23, 2022, 12:19:28 AM »
Hopefully I’m better at grit out of carbs than I am at posting pictures, Maybe not so many at once ‘eh ? 102833-0
 The new speedometer cable once connected at engine end was too short at tachometer end, cut housing shorter with tubing cutter by 3/4 of an inch then reflared102833-1102835-2102837-3

Offline DaveHunter

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  • Location: New England USA
Re: 1971 R5 repairs
« Reply #46 on: June 23, 2022, 12:29:53 AM »
I messed up the tank painting royalty, probably my fault but it is from a different batch from supplier as well . As shone the candy orange doesn’t match between gas tank and oil tank. It will have to wait for redoing as riding season is here. 102839-0102841-1

Offline DaveHunter

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Re: 1971 R5 repairs
« Reply #47 on: July 02, 2022, 11:27:38 PM »
It’s got a couple hundred miles on it now. Here’s some initial observations . Starts reliably and ran good up until full throttle then would bog down.
 As found the carbs had only 110 main jets with the needles raised to next to last clip so there must have been an issue 40 years ago when this bike was stored. I ran it a couple miles and looked at plugs one looked good slight brown on left side a little lighter colored on right.
 Put in correct ???? Main jet # 130 genuine Muc and made problem worse , it would slow down on highway if rotated  full throttle trying to keep up with 70 mph traffic , back off and power came back.
 The exhaust baffles had been pulled and looked looked pretty clean but removed them and found a lot of the holes were a smaller diameter due to carbon. Cleaned all of them out with a drill bit then drilled four 3/16” at the rearmost area.
 Made a wicked difference in the top rpm range really made a difference. I made no other changes / one thing at a time.
 Unfortunately something broke on the clutch linkage so made it off the highway and awaiting rescue

Offline DaveHunter

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Re: 1971 R5 repairs
« Reply #48 on: July 03, 2022, 12:59:08 AM »
102940-0
Haul Of Shame
« Last Edit: July 03, 2022, 01:19:19 AM by DaveHunter »

Offline robrd

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Re: 1971 R5 repairs
« Reply #49 on: July 03, 2022, 09:53:37 AM »
Hi Dave, just think of it being a mobile show stand. Looks good though.

Offline Captain Scarlet

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Re: 1971 R5 repairs
« Reply #50 on: July 03, 2022, 12:45:59 PM »
Persevere Dave,great bike  ;)

Offline 5port

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Re: 1971 R5 repairs
« Reply #51 on: July 03, 2022, 08:00:14 PM »
Hi,
The removable baffles can be best cleaned by putting them in a wood fire that is burning clean.  They don't need to be too hot, just hot enough to burn off the oil coke.  You will need to wire-brush and oil them afterwards.
However, the whole pipes will have a fair amount of carbon/coke in them.  The only real way to remove that is a warm soak in Lye (caustic soda) at about 1lb caustic crystals to 1pt water.  Heating it and keeping it at about 80*F will do the job in about a week. I do them cool without heating about 50*F and it takes a month. You have to circulate the solution inside about every few days.  This is what Chrome platers do to strip/clean items before plating, they hate 2T pipes because they spoil their hot Lye bath with all the crap that comes out.  Some members have made their own hot baths with large dia plastic pipe and thermostat controlled immersion heater.
Beware, Lye (caustic soda) is deadly and dangerous.  You must read it up before using and it is dangerous to everything, so don't do it where it can hurt/damage anything, like things,people,children,pets animals etc.
So, have a think about that and read it up. BTW, It is safe with Chrome and Steel.

5port     
5port