Bun Burner 1500 on Ultima 113" in 87 Heritage
Elite HDF Member
Joined: Sep 2007
Posts: 4,468
Likes: 12
From: Bluffton, South Carolina
We been using Ultima motors for quite a while and use the VOES on all heavier bikes or bikes with added loads, ie: taller gears , mostly two up riding, or people who do a lot of loaded touring. We set the VOES at 7Hg and find that works well for most applications. What are you running for jets?? If the jetting is larger than needed then you will get more standoff. If the valves are not right or not seating properly you will also get standoff. You might want to do both a compression check and leakdown for baselines anyway. Hope this helps. Please feel free to contact us at 518 469-8426 with any questions you might have.
Road Warrior
Joined: Apr 2007
Posts: 1,354
Likes: 1
From: S.W. Florida
Reversion (stand off?) seemed the likely culprit for the gas dribbling out the air cleaner.
The manual states a couple of times that modifying or changing the ignition module voids the warranty. Kind of strange. Ultima also states that they do not recommend use of a VOES.
At this point, itmay be worth a call to their tech department if I can dig up the number.
I hadn't actually considered that the poor MPG and VOES could be related. My initial thought for VOES was the fact that it pings under load when it gets hot.
I appreciate the input and will advise as changes are made.
The manual states a couple of times that modifying or changing the ignition module voids the warranty. Kind of strange. Ultima also states that they do not recommend use of a VOES.
At this point, itmay be worth a call to their tech department if I can dig up the number.
I hadn't actually considered that the poor MPG and VOES could be related. My initial thought for VOES was the fact that it pings under load when it gets hot.
I appreciate the input and will advise as changes are made.
Good luck with yours!!
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Cruiser
Joined: Apr 2007
Posts: 181
Likes: 0
From: Chesapeake, VA
Intake seal leak on Front cylinder is the culprit.
Used much WD40 at various engine speeds to try and proof the seals. Could never get it to stumble, but... changed the seals yesterday and things got much better.
Took it for an 80 mile loop and got 34MPG in mixed riding (full throttle to steady 75MPH cruise to stuck in traffic. Saw no evidence of stand off either. Probably caused the discoloration on the front cylinder fin as well.
So I'm running a 25 pilot at1 & 1/4 turns out and the bike definitely feels better,.. smoother and much more powerful. Now I can start tuning it per the manual.
Never would have suspected intake issues from the factory.
Still needs a VOES but it's all good.
Appreciate the feedback.
Deet
Used much WD40 at various engine speeds to try and proof the seals. Could never get it to stumble, but... changed the seals yesterday and things got much better.
Took it for an 80 mile loop and got 34MPG in mixed riding (full throttle to steady 75MPH cruise to stuck in traffic. Saw no evidence of stand off either. Probably caused the discoloration on the front cylinder fin as well.
So I'm running a 25 pilot at1 & 1/4 turns out and the bike definitely feels better,.. smoother and much more powerful. Now I can start tuning it per the manual.
Never would have suspected intake issues from the factory.
Still needs a VOES but it's all good.
Appreciate the feedback.
Deet
HDF Community Team
Joined: Dec 2005
Posts: 5,394
Likes: 2,596
From: NC USA
Intake seal leak on Front cylinder is the culprit.
Used much WD40 at various engine speeds to try and proof the seals. Could never get it to stumble, but... changed the seals yesterday and things got much better.
Took it for an 80 mile loop and got 34MPG in mixed riding (full throttle to steady 75MPH cruise to stuck in traffic. Saw no evidence of stand off either. Probably caused the discoloration on the front cylinder fin as well.
So I'm running a 25 pilot at1 & 1/4 turns out and the bike definitely feels better,.. smoother and much more powerful. Now I can start tuning it per the manual.
Never would have suspected intake issues from the factory.
Still needs a VOES but it's all good.
Appreciate the feedback.
Deet
Used much WD40 at various engine speeds to try and proof the seals. Could never get it to stumble, but... changed the seals yesterday and things got much better.
Took it for an 80 mile loop and got 34MPG in mixed riding (full throttle to steady 75MPH cruise to stuck in traffic. Saw no evidence of stand off either. Probably caused the discoloration on the front cylinder fin as well.
So I'm running a 25 pilot at1 & 1/4 turns out and the bike definitely feels better,.. smoother and much more powerful. Now I can start tuning it per the manual.
Never would have suspected intake issues from the factory.
Still needs a VOES but it's all good.
Appreciate the feedback.
Deet
Always good to get updates on issues, especially when it's good news.
Club Member
Joined: Jun 2007
Posts: 45,429
Likes: 2,897
From: Bedford UK
Small point! The VOES actually retards the ignition timing briefly when vacuum is increased, as under acceleration. As the engine 'gets into its stride' and vacuum drops the VOES returns timing to normal. It operates with electronic ignition systems.
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