Topic: Mix Match 750 build - next stage cheap 836 kit

[seanbarney41]

yeah, looks like you are good on the fork internals and are on the right track.  I forgot that you had posted  pictures up the page.  Now it should just take some experimentation to get closer to what you want.

[Shtonecb500]

rock on, thanks for the input as always. Im buying an 83' r80st tomorrow - im #$%*ing geeked.

[Shtonecb500]

Officially finished with trying to mod this bike into my full time tour and everyday bike, not because I've given up, but because I was able to score another more suited. Acquired an airhead for touring and commuting duties while this can just be what it is, it's still getting an 836 kit, electronic ignition, and new shocks, it just got the race tech internals that are not properly tuned yet.

The M unit is going to the BMW so I purchased a new K1 style harness for the 750 and installed it today.....I had a few shorts all over the harness and was experienced head light flickering, the light would come on with the key but the switch being in the off position, if I moved the main harness at the neck and tank the bike would die or the lights would go out...front and taillight...I was putting off fixing this until I was ready to install the m unit but ya.

New harness works great, unfortunately one of my motogadget pins is not bright anymore only throwing a very dim light and I think its because I was plugging and unplugging components while the key was on...I have a spare set but im bummed I #$%*ed one up....big loss just to swap in a new harness...#$%*ers are 90 bucks a pair.

Bike is due for tune up - Trying to complete these two middleweights and send them off before I dive back into the 750's and bmw.

Once the middleweights are gone all I'll have is the 74'  and 71' 750's  and 82' R80.....not bad at all and will probably be very content with those three for a long while.

edit:

installed electronic ignition from 550 onto this 750, adjusted valves and timed.

installed new tires - odo reads 7400 currently,since i spun it back to zero.

going to laurel highlands this weekend which is about a 5 hour ride, going with my buddy who is on a bmw 850 and another on a r100 airhead.

lubed cables, all valves accepted 004 and i set them all to 003

I think my rear sprocket will be due for change after this season.

If the 550 sells this weekend Ill have budget money for the k1.

[Shtonecb500]

Tapered roller bearings are almost 60 bucks now but I lucked out because I had a few sets for other front end swaps, I had gsxr and VFR front end swap bearings and the damn VFR bearings are the correct ones. I've got the bike lifted with the front wheel off and almost the entire front end off of it.

The plan this week:

Ever since the race tech internals and springs came out of the 550 forks and into my 750 forks, they squeak ALOT....over EVERYTHING AND ANYTHING. It's pretty frustrating to listen too, if you thought squeaking brakes all day was bad try squeaking brakes AND squeaking fork internals. My lower triple would not accept a new steering lock that I purchased a while ago so this is the reason I wanted to swap lower triples.

The tapered bearings are greased and ready to slide onto the stem, Ill need to remove the stock races from the frame and install the new races, im going to re polish my top triple and fork lowers as well.

The forks and calipers will be reversed and sitting behind the fork lowers between the lowers and the motor rather than out in front of the wheel, new banjo fittings will be installed to make this work properly, followed by fresh fork fluid and new brake fluid.

Sending out a set of jugs for boring in the next week or so hopefully so my motor is not sitting around taken out of the bike and opened up for weeks. The motor is getting some cruisin' image 836 pistons. The bike needs to clutch plates too.

One rear spoke broke so the wheel needs to come off and get rebuilt, I thought it would have been the spoke that I bent accidentally a couple seasons ago but its another one...I cheaped out and got some stock-ish chrome finish spokes but will spring for some new SS spokes/nipples from buchannans.

Ive noticed about half way through my season i need to change fork fluid...how often are u guys changing it out?

I ended up not riding the bike to PA due to weather forecasts but I learned my lesson and will 100% do it next time.

Rode the 550 home :0)

[Shtonecb500]

Tapered bearings, new lower triple, triple tree lock installed, new fork fluid, new brake fluid, reversed and rebuilt calipers.

[grcamna2]

Wow  !  The bike is looking real good the way it's set-up now 
Does it also have an 18" front;how's it handle with that ?

[Shtonecb500]

Wow  !  The bike is looking real good the way it's set-up now 
Does it also have an 18" front;how's it handle with that ?

Thank you.

The 18" wheel is interesting because i wanted it for its more aggressive stance and look, but i utilize the bike as my everyday and touring bike, the 18" wheel does indeed provide quicker steering. Additionally, there is a heavy truck lite lamp installed with the shoei fairing adding weight as well as sitting up high making the steering top heavy sometimes. It doesn't help that the adjustable handlebars im using are much wider than anything stock, at freeway speeds my arms are out a little too wide i think and sometimes makes it worse in the head-on winds/crosswinds especially on curves. While I'm experiencing all of this I've been trying to dial in the emulators in the forks so it's been alot of taking stuff on and putting stuff on..

The 18" adds installation problems because it puts the rim in line with bolts for the caliper arm and fender so i run shorter bolts and have to be careful not to trip since its not getting too deep. I have to remove a caliper and then remove the wheel because the tire wont fit between twin calipers. I cant easily service my calipers or access the allen bolts because of the dual calipers, so the 3 bolts on the calipers arm come off every time....I feel like ill have to heli coil them soon....


at the end of the day it would probably be much better with a 19" wheel up front and more comfortable. Thats just me being picky tho, the handling is great, im sure it will be better with more turning, i ride this thing hard and  itnever lets me down and has never made me feel like it was gonna go down, in the pinches its actually performed very well.

ill put more narrow bars on, stock lamp, and no fairing and take the bike out, see how it handles.

not gonna lie, I have a gxsr fork sitting in the trailer, ill probably get a triple and hub from cognito one day and re use the spokes and front rim.

[grcamna2]

You might miss riding w/o a fairing.

[Shtonecb500]

You might miss riding w/o a fairing.

imma take it off just to experiment with that set up for a day lol, i take my fairing off sometimes, i install it again the next day every time.

considering sale mods.

remove wrinkle tank and replace with another regular tank
remove rox risers
maybe remove adjustable handle bar and replace with stock option
new stock repop spokes in the rear
remove or leave damaged finned covers
mod torozzi brace with bracket to mount proper fender
top end rebuild on motor no big bore
seat recover from ebay
new rattle can black body kit

sell.

[Shtonecb500]

I got caught a few weeks ago in a heavy downpour, once i rolled to a stop light the motor just died. I pulled it onto the sidewalk and it was behaving as if my plugs caps rubbers were bad and wet...the bike eventually started and got me home the last few miles on 2 cylinders.

The next few days were dry but the bike behaved in this manner:  Upon start up it fired up no problem and got as far as 2 miles  running on all 4 and then all of a sudden cylinders drop, the bike will always stay running even at a light, and will continue to ride on 2. I pulled the tank and drained the gas, pulled the petcock and it looked like ball of rubber cement almost....Ill include a picture below...cleaned the petcock, put some new fuel into the tank, the pilot/slow jets were clogged, blew them out installed them and they had the same thing happen.

#$%* time because we are having an indian summer this week in detroit and would love to ride....dont wanna joy ride the cb500 but #$%* it, maybe I should.

[Kevin D]

Is that tank lined?

[newday777]

Is that tank lined?

That is my thoughts too. Failed linerd??

Edit....
Or is it the fiberglass tank from the 1st post of this thread? I've had problems on a Norton Commando the past couple of years that I was starting and riding for a 90 year old friend that had a glass tank that we had to drain the carbs and flush the crap out of the float valve (single Mikuni conversion on it). The glass git gummy inside the tank from today crap gas.

[Alan F.]

When I got my K3 in 2001 the petcock bowl was full of goo like that, that tank was unlined and that was before E10 gas too.

[Kevin D]

How long has the screen looked like that? That’s nasty!

Anthony, I might try and have a short ride today or tomorrow.
There’s some sunshine just now! I’m 1, one ride for October.
5 minutes sun is gone, roads wet and leaf covered.

[Shtonecb500]

Hi everyone, the tank is not lined and actually very clean on the inside so i was surprised to see this stuff, I feel like water combined with #$%* gas or soemthing and clogged up my #$%*?
carb rebuild kit and petcock rebuild are in the mail on the way.



The tires on the cb500 are original so wet leaves on the ground scares the #$%* out of me lol.

[newday777]

Hi everyone, the tank is not lined and actually very clean on the inside so i was surprised to see this stuff, I feel like water combined with #$%* gas or soemthing and clogged up my #$%*?
carb rebuild kit and petcock rebuild are in the mail on the way.



The tires on the cb500 are original so wet leaves on the ground scares the #$%* out of me lol.

Did someone pour sugar in your tank?

Yup, old rubber is hard and slippery.......

[RAFster122s]

It , sugar, normally would caramelize when it hits the warm carbs or motor...

[Shtonecb500]

The gas tank was cleaned out and carbs were cleaned months ago but I only just now installed them, new tank lock installed  that now requires a cut key so no one can open my gas lid...if that is what happened.

This bike still needs its bodywork repainted and the 836 kit installed.


My k1 is like 88% completed.

[Shtonecb500]

Hi everyone, the tank is not lined and actually very clean on the inside so i was surprised to see this stuff, I feel like water combined with #$%* gas or soemthing and clogged up my #$%*?
carb rebuild kit and petcock rebuild are in the mail on the way.



The tires on the cb500 are original so wet leaves on the ground scares the #$%* out of me lol.

Did someone pour sugar in your tank?

Yup, old rubber is hard and slippery.......

since the trouble started while I was out riding in heavy rain, I can't really be certain what the stuff was or what caused it. I won't deny that it could have been sugar from someone but I honestly don't think I have any enemies around here. Either way, carbs are rebuilt, I did have to replace one of the carbs as it was cracked where the jet screwed into the body.

edit: cometic head and valve cover gaskets are ordered....the head gasket was about 55 bucks on eBay and the valve cover gasket was 24 bucks from Summit racing, the pistons and rings are on standby and im about to order some Kibblewhite exhaust valve guides.

[Shtonecb500]

SYMPTOMS are back. The bike is back to its problematic characteristics of running like its dropping cylinders....2-3 didn't feel AS hot as 1-4 but were still hot....maybe the electronic points are finally failing, maybe the coils are failing? The points came off a beater cb500 out of Chicago like 6 years ago, no clue how many cycles were on it.

I think I'm just going to pull the carbs off completely instead of just removing bowls and jets to verify the carbs aren't clogged again. The tank and fuel lines are all clean and new, the carbs are freshly rebuilt so they should be clear, I'm looking and praying they are clear. If not then it should be easy to look back at the inside of the gas tank...otherwise like I mentioned earlier....coils or points?

Phil gets back from Florida in a few weeks hopefully the rebuild can happen right away.

[seanbarney41]

Bet ya it's ignition...just swap some oem poimts back on there and I bet you will never have a problem again

[Shtonecb500]

Inside of tank and petcock are spotless, pilots jets and main jets are spotless. Its gotta be electrical..I'll get to meter testing this weekend.

After that I organized parts for the k1 and laid out what I have for the R80, surprisingly in good shape even though the stuff is dirty as #$%*....Its still gonna be about 1k minimum probably to get the r80 road worthy....thats including tires.

[HondaMan]

If it turns out to be the condensors....you can always disconnect them and run one of my boxes with the points alone.

I'm curious about the handling with the 18" front tire as it reduces the already-minimal (smallest in the 750 bike family, actually) front trail. It was only 3.25" until the 750F0 when it became closer to 3.75", while 4.00" is considered 'normal' for bikes over 400 lbs. weight. When I made that change on a 750 for a very short-legged customer years ago (3.00x18 front to clear the brake pieces), I also had to drop the rear tire (ultimately to a 4.50x16" size) to make the bike stop feeling 'twitchy' at hiway speeds over 75 MPH (this was before the infamous 55 MPH speed limit kicked in). Today we can get a nice steering damper: them days there weren't anything like it. I sure like mine...

[Shtonecb500]

If it turns out to be the condensors....you can always disconnect them and run one of my boxes with the points alone.

I'm curious about the handling with the 18" front tire as it reduces the already-minimal (smallest in the 750 bike family, actually) front trail. It was only 3.25" until the 750F0 when it became closer to 3.75", while 4.00" is considered 'normal' for bikes over 400 lbs. weight. When I made that change on a 750 for a very short-legged customer years ago (3.00x18 front to clear the brake pieces), I also had to drop the rear tire (ultimately to a 4.50x16" size) to make the bike stop feeling 'twitchy' at hiway speeds over 75 MPH (this was before the infamous 55 MPH speed limit kicked in). Today we can get a nice steering damper: them days there weren't anything like it. I sure like mine...

Its currently got a Dyna ignition in there, I cant find the points plate I had installed before I put it in...it was a used Dyna ignition too, no clue how much use it got on the bike before I adopted it.

I LOVE the look of my 18" front wheel but its twitchy, and I have it loaded with that shoei fairing, I always think about putting a 19" back on the front but I just love the look of the 18" too much. I should swap the black wheels on this bike onto my gold k1 and the silver wheels on the k1 onto this black bike...

[grcamna2]

If it turns out to be the condensors....you can always disconnect them and run one of my boxes with the points alone.

I'm curious about the handling with the 18" front tire as it reduces the already-minimal (smallest in the 750 bike family, actually) front trail. It was only 3.25" until the 750F0 when it became closer to 3.75", while 4.00" is considered 'normal' for bikes over 400 lbs. weight. When I made that change on a 750 for a very short-legged customer years ago (3.00x18 front to clear the brake pieces), I also had to drop the rear tire (ultimately to a 4.50x16" size) to make the bike stop feeling 'twitchy' at hiway speeds over 75 MPH (this was before the infamous 55 MPH speed limit kicked in). Today we can get a nice steering damper: them days there weren't anything like it. I sure like mine...

Its currently got a Dyna ignition in there, I cant find the points plate I had installed before I put it in...it was a used Dyna ignition too, no clue how much use it got on the bike before I adopted it.

I LOVE the look of my 18" front wheel but its twitchy, and I have it loaded with that shoei fairing, I always think about putting a 19" back on the front but I just love the look of the 18" too much. I should swap the black wheels on this bike onto my gold k1 and the silver wheels on the k1 onto this black bike...

The gold K1;is that the one you found and bought where the PO was an engineer and installed custom(rear shocks)parts to give it much better/personal for him performance on the road ?