Backfire through carbs and 4,000 RPMs max.

[brianinpa]

Denver » Mon Nov 09, 2015 6:24 pm[/url]":37q15phy]
Sorry to read of your luck, :Awe: hope you find a good replacement 81 motor, so you will have some spare motor bits, parts, & pieces. :yes:

It looks pretty slim in this area right now unless I buy a complete bike... then I'll have lots of spare parts!

 

[Denver]

Tiss the season, :hihihi: cheapest time to buy bikes is over the winter months. :yes:Good hunting :salute:

 

[rob.lafady]

I saw on facebook someone in Texas has two parts 1100's for sale for $300...

Sent from my HTC One M9 using Tapatalk

 

[C5Performance]

Sorry to read about this issue. Backfiring through carbs normally indicates sticky valve or incorrect timing because when the sparkplug fires the intake valve should be closed, making a backfire physically impossible.

Black sooty plugs could be low compression, lack of coil amperage as JoeDrum explained, or if you have been running the engine at low rpm it could even be fuel related.

If you are still trying to sort it, begin with direct coil power to battery (again, as Joe and Dan stated). Since all 4 cylinders have similar compression and they are all black I doubt it's a loose coil lead or plug cap.

I will be watching this to see how the story goes....

 

[bronko37]

I feel your pain Brian, I am going to do an engine overhaul on my '76 this winter. My compression readings are super low too, about 90psi per cylinder. I have oil literally coming out of my exhaust, however I am amazed at how well this bike still runs. I can't imagine how hard its gonna pull adding 50+ psi per cylinder. Gonna be a fun winter project.

Good luck,

 

[brianinpa]

So many choices. Seems all the 1100 motors on ebay are a long ways off, so I am looking at an 84 Interstate. Guy claims when he was trying to sell it, the buyer crashed it on the test ride. Can't beat the torque from that 1200 motor. It may be time to make a franken-1100.

 

[joedrum]

oh my ...this is getting interesting ...sounds like a great plan to me ....but i guess thats a given with my reputation LOL :hihihi: :builder:

 

[brianinpa]

joedrum » Tue Nov 10, 2015 10:14 am[/url]":36q6fwkn]
oh my ...this is getting interesting ...sounds like a great plan to me ....but i guess thats a given with my reputation LOL :hihihi: :builder:

:smilie_happy: Thanks! I needed the laugh!!!

 

[joedrum]

seems perfect brian the c5 will go right in the 84 1200 motor

 

[Denver]

84 motor is a great option, :good: would be my choice. :yes:

 

[bronko37]

Only with Honda Goldwings will you find folks taking a dressed bike motor and putting it in a smaller frame bike naked, or taking a smaller naked bike and dressing it up with all the goodies.... :doh:

 

[joedrum]

so true LOL

 

[slabghost]

Hmmm 81 1200? Lot's of possibilities there. :BigGrin:

 

[brianinpa]

bronko37 » Tue Nov 10, 2015 11:23 am[/url]":3jtb3gzx]
Only with Honda Goldwings will you find folks taking a dressed bike motor and putting it in a smaller frame bike naked, or taking a smaller naked bike and dressing it up with all the goodies.... :doh:

Once you ride a 1200 Standard and compare that to an 1100, you understand just how much of a difference those 100 CCs really make.

My goal for the 1100 before this problem started was to keep the Vetter fairing but to put on an older WJ III, get rid of the Interstate bags and trunk in favor of a set of Bates bags that I have and run with no trunk unless I was going on a trip which I would then have the Interstate trunk to put on the bike, and then paint everything black with charcoal black highlights... the Bates bags are already on the bike.

Now fast forward to today when the 1100 motor appears to be failing. If I can find a semi-complete 1200, well that could solve a few problems. First a foremost, an engine for the 1100 and then I could have a spare rear wheel to work on going darkside on the 1200...

My wife thinks I am crazy, but there is a method to my madness :BigGrin:

 

[Denver]

More than the 100cc's, :smilie_happy: hydraulic lifters, clutch, bigger tires that improve handling, 4,000 rpm =80, instead of 60mph. The list goes on, & on. :salute:

 

[dan filipi]

Not just that but with 1100 heads and 1000 cams it can be made a stump puller with a single carb.
So far from the list of parts I think you have, you already have all the ingredients, just add 84 motor.

 

[brianinpa]

Yeah Dan, I'm pretty sure I have everything for that except the housing for the ignition on the back side of the cam shaft.

 

[canuckxxxx]

+1 on the '84 motor. It's a straight bolt-in. And if you buy a whole bike you can get the hydraulic clutch, electric fuel pump, and 1200 exhaust etc. All of which add cost if you have to buy them.

Brian

 

[Tom_Charlton]

There's an 84 with bent front forks and cosmetic damage on Craig's list in Hedgesville WV (about 120 miles from you) for $300. If you go for it, let me know quick because I'm planning to drive out there tomorrow to buy it.

https://martinsburg.craigslist.org/mpo/5260377029.html

Tom

 

[joedrum]

i think hes already looking at that one ...