Rode the 83

[dna9656]

I rode the 83 last night. Rainy with increasable glare form the windshield. Turned around and went back home!

While riding the bike ran at 2500 RPM at 45 MPH. 3000 RPM at 55 or 60 I can't remember which. When accelerating there were times when the bike just "came on" a sudden burst of power; then back to what it was. TCI issues? When I first started it under a little choke it did this too (at idle) then smoothed out as it warmed up. The idle got too high even after opening the choke so I backed off the idle speed a little, now of course it's too low out on the street but I can bump that back up a little.

So are these speeds/RPMs typical? Am I producing the right amount of power/speed vs rpms?

My headlight (H4?) seems dim, I'm replacing that as well as cleaning the inside of the lens. I have a new bulb too.

I got the CLASS modified without too much trouble. I tried to use the mounting plate for the rear cylinder that has a hole for the shrader valve with the Yamaha shock but the set up is different so I left the dampen valve in place and the shrader valve is now just under the seat on the left side. The front forks.. well I removed the banjo bolt /air hose from the compressor assembly and screwed the shrader valve from the extra shock/spring unit I have to the banjo bolt and shot the max allowable air into it, measured the air and it's holding the pressure as is the rear shock as well.

The PO told me this bike sat for 2 years, so I didn't expect to find any PSI when I checked for air pressure in the rear suspension. I for over 20 PSI, AND when I cracked the line for the front fork I got a HISS of air from it as well! I think this speaks VERY WELL to the pressure holding capabilities of the system! Way to go Yamaha!

The bike's suspension rode nicely last night.

I hope some one can give me some advice concerning the engine's performance!

[Peder_y2k]

TCI issues? I don't think so, more likely carb or fuel ratio issues. Carb synch done? What was the high vacuum reading when sync adjust ended?

-Pete, in Tacoma WA USA

[Peder_y2k]

When accelerating there were times when the bike just "came on" a sudden burst of power; then back to what it was. Sounds like the engine rpm's were not high enough in the power band for the 'what it was' level of acceleration. Try shifting down to get the rpm's up for the sudden burst of power. That's the nature of the beast

-Pete, in Tacoma WA USA

[Prairiehammer]

When accelerating there were times when the bike just "came on" a sudden burst of power; then back to what it was.

 

Doug, I experienced the same sudden surge on my '83. The bike had been sitting for awhile when I got it and apparently the carbs were a bit dirty. Anyway, it would idle (finally) and accelerate seemingly OK, when suddenly, it would "just take off" like a striped ass ape.

The idle circuit of the carbs was not optimum, and I compensated with idle speed and pilot jet settings to get it to idle and pull from a stop without hesitation, but then VOOM, it'd take off like the SAPE. Finally after multiple 'shotgun' cleanings and a few tanks of Seafoamed gas, the idle was getting faster and smoother and I would slow the idle and tweak the pilot screws, etc. until it became a smooth strong acceleration throughout the range.

It, like all MKI Ventures likes the higher RPM and will pull stronger as the RPMs climb, but the sudden surge was remedied when the idle circuit was cleaned up.

[dna9656]

All;

Thanks for the input and ideas. It's been so long since I rode my 1st Venture (1996) that I really don't remember what I should be getting performance wise.

I have no idea where these pilot jetting adjustment screws are on the carbs, I located the idle speed screws by experimentation; something

inside me tells me I should avoid doing....

Other issues:

Does the Venture windshield normally glare real bad in the rain like it did last night?

 

I'm installing more overhead lighting in the shop this afternoon. I can't see much of anything on the bike without a drop light and it seems the d--n is thing is in the line of sight or right in my eyes!

I currently have 12 4' fluorescent twin tube fixtures in my 24'X36' shop,

I'm adding 12 more of the skinny ones as I'm told the fat one are going away. So far I have 2 fixtures up and I'm not impressed.

Maybe then I can see!

SUNLIGHT!!!

Edited April 28, 2014 by dna9656
thisnthat

[Venturous Randy]

All;

I have no idea where these pilot jetting adjustment screws are on the carbs, I located the idle speed screws by experimentation; something

inside me tells me I should avoid doing....

SUNLIGHT!!!

 

 

There is only ONE idle speed adjustment and it is a thumb screw wheel under the carbs on the left side of the bike. The other screws are for syncing.

The air/fuel screws are under the diaphragm covers and if they have not been messed with, will have covers that will have to be removed.

RandyA

[dna9656]

There is only ONE idle speed adjustment and it is a thumb screw wheel under the carbs on the left side of the bike. The other screws are for syncing.

The air/fuel screws are under the diaphragm covers and if they have not been messed with, will have covers that will have to be removed.

RandyA

 

Thank you Rasndy! You are so good!

So I just got back from a 50 mile trip.

This is not a motorcycle, it's fighter jet that flys really low!

The throttle is slow returning to idle, I lubed one cable (weeks ago)till the oil ran out down at the carbs but the other was impossible to get at; any suggestions? I hosed down the springs on the throttle shafts on the carbs with WD-40 a few weeks ago figuring they too were gummed up. The L/H switch housing (horn, blinker, bright light) is rotating on the handle bar; the screws are tight, any thoughts on this?

I put some anti freeze in it figuring it wasn't completly full, yes I did it with the engine running... it used about a half tank of gas; that seems a little too much; I figured about 200 miles per tank? That's what my 16 Road Star gets with 2 cylinders...maybe it was that 85 mph thing...ZOOM-ZOOM!

[Neil86]

Next time the idle seems to be hanging up.....inspect the linkage to see if the linkage is

resting on the idle stop screw (the one that you turn with 2 fingers.

 

if its already resting on the screw....its likely a vacuum leak causing the slow return to idle.

[dna9656]

Next time the idle seems to be hanging up.....inspect the linkage to see if the linkage is

resting on the idle stop screw (the one that you turn with 2 fingers.

 

if its already resting on the screw....its likely a vacuum leak causing the slow return to idle.

Neil;

It doesn't HANG up like a notch, when the rotate the throttle back down it's like the springs on the throttle shafts are pulling the throttle cable but there is gunk in the cable slowing it's travel. I bought one of those cable lube things that's supposed to direct the lube down into the sleeve of the cable. All it did was make a mess on the Road Star and I can't get it on the return cable of the '83. I tried dripping the lube down the sleeve, I had good success with the PULL cable but I couldn't get the return cable out of the housing to get the drips down the sleeve. I think I may have to pull the cable and lube it from the carb end...

[Neil86]

Ok...I mean slow to return to idling speed....not stuck..if you have verified

its still off the stop, its the cables or linkage.

 

Regarding the cables, you realize there are 4 cables and an intermediate

junction box. (actually 5 cables if the bike has cruise)

2 upper cables (from throttle grip to junction)

2 lower cables from junction down to carb

1 cable from cruise actuator to junction

[dna9656]

Ok...I mean slow to return to idling speed....not stuck..if you have verified

its still off the stop, its the cables or linkage.

 

Regarding the cables, you realize there are 4 cables and an intermediate

junction box. (actually 5 cables if the bike has cruise)

2 upper cables (from throttle grip to junction)

2 lower cables from junction down to carb

1 cable from cruise actuator to junction

 

Yes she's got cruise, the light comes on, I set it and the speed creeps down REALLY slow, so slow that I can't tell if the it's the throttle cables or a weak cruise control, so I thought I would start with the cables. The throttle creeps down when the cruise is off too. Heck it might be a disconnected vacuum as well!

I have one new cable on hand. I noticed a very frayed cable on the 85 and ordered one off ebay, it's the handle bar cable. P/N

41V-26312-00-00 Cable, Throttle 2. The other is 41V-26311-00-00 called Throttle 1.

Too bad they couldn't use the same cable in all 4 locations. Yamaha does spec this cable for nearly all the XVZs 1st and 2nd Gens.

[Neil86]

my point is it could be in the cables or the junction point.....84 (and your 83 and a arf...)up its a wheel that rotates in the junction.

[pmelah]

i just stuck the hose from the pb blaster spray can in the end of all 5 cable ends from the junction block stuck a rag around the end and 3 cans later i have free action cables did it to the speedo cable too after all that i spray silicone lube spray in them every so often now works fine left switch a piece of thin rubber around the bar and then tighten the scres up that should hold it in place trum to fit and old bike intertube works great for that

[dna9656]

i just stuck the hose from the pb blaster spray can in the end of all 5 cable ends from the junction block stuck a rag around the end and 3 cans later i have free action cables did it to the speedo cable too after all that i spray silicone lube spray in them every so often now works fine left switch a piece of thin rubber around the bar and then tighten the scres up that should hold it in place trum to fit and old bike intertube works great for that

 

I couldn't get one cable out of the housing to even get at it. Guess I'll have to try some more.

Thanks!

[dna9656]

my point is it could be in the cables or the junction point.....84 (and your 83 and a arf...)up its a wheel that rotates in the junction.

 

Any idea where the cruise control junction box is located in the parts book?

[Neil86]

Go to the "Handlebar Cable" page.....

 

Note that the early standard non cruise (4 cable)Ventures had a slide arrangement vs the wheel for the 5 cable cruise models.

[Peder_y2k]

http://www.partzilla.com/parts/search/Yamaha/Motorcycle/1988/VENTURE+ROYAL+-+XVZ13DU/HANDLEBAR+CABLE/parts.html

 

Looks to be in 'HANDLEBAR CABLE'

-Pete, in Tacoma WA USA