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Old 09-10-2012, 03:48 AM   #1021
advNZer?
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Originally Posted by Box'a'bits View Post
Probably be there - but I've already committed to going to another Airhead event that weekend. We'll see how that goes, & what Mandy's tolerance levels are like.
both events?
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Old 09-10-2012, 04:17 AM   #1022
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Starting to make progress with Gus. I realised that the timing marks on the flywheel are different between early '78 (12/77 production date) & '91 flywheels. I actually knew this, but hadn't really thought about it when I put the heavy flywheel on. Consequently I've been running '78 timing. The later bikes ran with 'S' marks 6 degrees further towards TDC (about 12.5mm movement in marks). By using an existing mark above the 'S' mark, I get things about right for idle, but exactly on the 'F' dot on the flywheel at full advance. That may mean the advance unit has some wear on it, or it may mean I need to research further. Need to think on it.

The jettings getting closer (mixture 1 & 3/4 out, needle jet 266, needle 3rd clip down), BUT I've still got that stumble on load at 100 Kms. What the..?

The 25mm increase in front travel seems good. I can hit speed humps at speed, & it takes it in its stride. It hasn't slowed steering too much. We'll see how things go, but at the moment we have a qualified success. .

The fork seals are not leaking. Unqualified success!!!!. For future reference Honda Part no 41490-MEN-A31. Includes one dust seal & one fork seal.

Priced up new fork bushes. $95 for 2 sets of All Balls, $78 for one side of Yamaha OEM. Gone with the OEM to see if there is a significant difference (especially given the experience with the All Balls / Honda OEM seals). Eventually got the Yamaha Bushes. 5XE-23171-LO & 5XE-23125-LO. While on that topic, Prutser had this to say on bushes for the KTMs. Basically tapering the teflon on the bushes & also using feeler gauge material to bush out the bushes for a tighter sliding fit. On my forks this makes sense - I can feel movement if the seals aren't in, therefore this has to wear them out faster.

Need to find a new place for the horn, now that the crash bars are gone. The horn had been shifted onto them after I relocated the oil cooler off the right crash bar.

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Originally Posted by advNZer? View Post
both events?
Quote:
Originally Posted by igormortis View Post
Quote:
Originally Posted by Padmei View Post
Don't worry about us that haven't been invited to any airhead rides - just go out & have lots of fun
Yes, those events. GuzziTony has suggested a pre-event trip through the Karapoti as well. That is fairly weather dependent from my perspective. If its pissing down all week (or its been snowing, as the weather forecast suggests), well....dunno...probably

Don't know about the Sunday Airhead event. We'll look at the detail Saturday.

Padmei, you could fly up, & I'm sure we could help you out here. Otherwise I'll take lots of photos for you.
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Box'a'bits screwed with this post 09-27-2012 at 04:04 AM
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Old 09-10-2012, 04:23 AM   #1023
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Quote:
Originally Posted by Box'a'bits View Post
Starting to make progress with Gus. I realised that the timing marks on the flywheel are different between early '78 (12/77 production date) & '91 flywheels. I actually knew this, but hadn't really thought about it when I put the heavy flywheel on. Consequently I've been running '78 timing. The later bikes ran with 'S' marks 6 degrees further towards TDC (about 12.5mm movement in marks). By using an existing mark above the 'S' mark, I get things about right for idle, but exactly on the 'F' dot on the flywheel at full advance. That may mean the advance unit has some wear on it, or it may mean I need to research further. Need to think on it.

The jettings getting closer, BUT I've still got that stumble on load at 100 Kms. What the..?

The 25mm increase in front travel seems good. I can hit speed humps at speed, & it takes it in its stride. It hasn't slowed steering too much. We'll see how things go, but at the moment we have a qualified success.

The fork seals are not leaking. Unqualified success!!!!.




Yes, those events. GuzziTony has suggested a pre-event trip through the Karapoti as well. That is fairly weather dependent from my perspective. if it pissing down all week, well dunno...

Don't know about the Sunday Airhead event. We'll look at the detail Saturday.

Padmei, you could fly up, & I'm sure we could help you out here.
the event(s) i speak of were mentioned to me by MD??.Do you want to have a look at my bike re timing and jets?
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Old 09-10-2012, 04:40 AM   #1024
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the event(s) i speak of were mentioned to me by MD??.Do you want to have a look at my bike re timing and jets?
Yes

Happy to help with timing. It's easy. Jetting - not so much...
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Box'a'bits screwed with this post 09-10-2012 at 05:09 AM
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Old 09-11-2012, 02:12 AM   #1025
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You didn't do a timing chain writeup cos the girl took the camera for the day
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Old 09-11-2012, 02:14 AM   #1026
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You didn't do a timing chain writeup cos the girl took the camera for the day
Yes but I talked about it - almost the same thing isn't it? . Actually there are a few photos there
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Old 09-11-2012, 02:39 AM   #1027
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Ahhhh. I puched in timing chain not cam chain into the search box.
Thanks for that - very informative as I was wondering about what to put on the end of the crankshaft & how to heat the bearing etc.
I did mean the sprocket when I was asking about the matching marks.

Well done sir!
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Old 09-11-2012, 05:00 AM   #1028
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Yes

Happy to help with timing. It's easy. Jetting - not so much...

no,i meant you can look at my bike for the purposes of getting yours right if you want
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Old 09-14-2012, 03:29 AM   #1029
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Rear Brake Mod

Spent a bit of time working on the rear brakes. A while ago I posted over on the Olds Cool Forum, querying whether the Paralever rear brakes could be improved. Generally the Forums response was unhelpful, but Travelling Sam was able to put me in touch with Simon from ‘Sore Bums Across Asia’, who had modified the brake lever to achieve a better cable pull.

The theory is that the lever in its stock configuration doesn’t have a straight pull on the cable. The eye is about 70 degree to the pivot, so some of the movement is upwards, rather than forward. The recommendation was to cut the eyelet off, turn it around, & re-weld to achieve a pull that is more at 90 degrees to the pivot.

I’d seen a write up on this modification before, but had almost forgotten about it. The posts with the mod had lost their photos, so Simon’s email & pictures were very helpful

The modification is not universally adored in the States. The gurus are of the opinion that brake components should not be welded. My view on this is more pragmatic. I don’t really have a useable rear brake as it stands. At least this mod gives me the capacity to enjoy some braking. I have spent 2 years relying on engine braking and front braking, which in the dirt can be exciting at times.

I did the modification last night. Here’s a photo just before I buttoned everything back up.



I also discovered that the rear brake light can be adjusted. That’s very helpful. The brake light had sometimes stuck on previously. Finally I’ve also adjusted the brake upwards a little, so that I can actuate it when I’m standing. I’m sure this will need some fine tuning.

The Mod was a complete success. I can lock the rear brake now, which was impossible previously.

Tuning Out The Stumble At 100kms:

The exhaust valve on the right pot had become noisy. On checking the clearance was wider than it should be. Unfortunately I didn’t measure it. I’m now wondering if I should pull the head. I’ll watch it over the next few rides.

Another suspect was the new fuel cap I put on pre the MMMM. I wondered if it was breathing properly. I replaced it with the chrome temp cap, to see if this would make a difference. Nup.

I have a bunch of spare jets from the RS to try. Standard main jets are 150. I've gone up to 160 to see how it runs. No difference with the stumble, but the pops & bangs are reduced.

Might try the fuel filters next.

Fork Bushes:

I am disappointed that TSS Red Baron has not been able to supply the Yamaha fork bushes in a timely fashion. These should have been here Thurs morning. I’m told that Yamaha NZ have supplied to Red Baron’s Akld headquarters, but that that RB are looking to bulk up the shipment prior to sending this on to Lower Hutt.

Remind me again why I used these guys?
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Old 09-14-2012, 04:13 AM   #1030
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I also discovered that the rear brake light can be adjusted. Thatís very helpful. The brake light had sometimes stuck on previously. Finally Iíve also adjusted the brake upwards a little, so that I can actuate it when Iím standing. Iím sure this will need some fine tuning.
I used to have to adjust my brakelight every WOF as either it wouldn't go on or off

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Iím told that Yamaha NZ have supplied to Red Baronís Akld headquarters, but that that RB are looking to bulk up the shipment prior to sending this on to Lower Hutt.

Remind me again why I used these guys?
I'm always surprised your experience with TSS is so different to mine.
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Old 09-15-2012, 03:25 AM   #1031
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Spend the day trying to Gus to run properly. I have run through the following:
  • Pulled the ICU & redid the heat sink paste;
  • Pulled the bean can, & replaced this with a spare. I had thought maybe there was an issue in the advance unit. Re-timed;
  • Pulled the coil to check this. Redid the sparkplug lead connections;
  • Put on new fuel filters. The two on Gus were meant for a much smaller bike. The new ones are of a similar style but a little bigger;
  • Pulled the carb / head rubbers. I noted a difference between the left & right spark plug (right side richer, left side very lean. It appeared that the left side had pinched up under one of the clamps, & was (possibly) allowing an air leak. Actually I was certain when I saw this that this was the issue, & that this might resolve things. I borrowed a rubber off the RS. Nup. Didn’t fix it;
  • Pulled the carb to bits, checked all of the passages & cleaned if practical, reassembled with new carb diaphrams;
  • Tried a 160 main jet. Certainly made the plugs appear richer, & allowed the bike to run on more, but didn’t fix the stumble.
The confusing thing has been the issues I experienced when I switched back to the standard exhaust. However I have come to the conclusion that this is a jetting issue. I am going to run a spread sheet & just work this thing through.

Eventually I ran out of time to resolve things, & just buttoned things back up. I figured that as long as I could run up to 4k RPM & 100kms I was okay.

Arrived late at the Airheads function (at 5.30), & not far ahead of the rain. There were a lot of Airheads there, but unfortunately I didn’t get to photograph them. Of the regulars here, saw Igormortis (on his R80RS), Boxer Odyssey, & Pampera (car).

Anyway, the launch of these were ostensibly the reasons for the function. Pretty cool huh. . Apologies for the crap photos. I was running out of daylight & it was just about to rain.



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It's just better when there's twins involved....

Box'a'bits screwed with this post 09-15-2012 at 04:27 AM
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Old 09-15-2012, 03:43 AM   #1032
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http://www.ukgser.com/forums/showthread.php?t=241567

worth a read
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Old 09-15-2012, 03:54 AM   #1033
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Really? Well I guess if you got value from it, then that's okay. But I'll pass. Cruising obviously means something different to you...
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Old 09-15-2012, 03:57 AM   #1034
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WTF? Did you post a correct link there SteveNZ?

Nutso.
I hope you get the problem sorted. Diaphrams I take it are good? Slide working as it should?

Got any more info on those bikes?
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Old 09-15-2012, 04:18 AM   #1035
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I hope you get the problem sorted. Diaphrams I take it are good? Slide working as it should?
Yup. Replaced the diaphrams today as well (had spares, couldnt see anything wrong, but thought that that would definitely rule that out). Slides do what they should.
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Got any more info on those bikes?
Not a lot. The Bopper is made out of an R80 mono. The tank is from a Keyway cruiser. The battery is under the gearbox. I'm guessing Boxer Odyssey did the casting for the airbox cover. The ISDT is pretty much all BMW parts. Damien from Cycleworks did both bikes exhausts
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Box'a'bits screwed with this post 09-15-2012 at 04:25 AM
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