saddletramp
New member
84 R100RT Loss of power
Good evening all,
I am experiencing a flat spot in the power band at about 3800-4000rpm in neutral and 4000 and above under load. In neutral, once past the small hiccup, rpms rapidly increase. Under load, in first gear, acceleratiion is more aggressive than stock. At 4000 it will continue to accelerate, just drastically slower to about 5500 where it doesnt have enough "grunt" to accelerate further. If I upshift and the RPM drops back to the 3000 range, will continue to accelerate as if nothing was wrong untill the 4000 rpm mark. Any gear above 1st will not accelerate past 4500.
The bike starts and idles fine, albiet with a bit of a lope to it. I currently have the idle speed set at about 1,200rpm which is a tad high for these. Its set that way to balance between happy bike and stable carbs.
Carbs are sync'd, Ignition system is new, Engine is, for all intent and purposes, rebuilt.
What I believe I'm running into is a lack of knowledge for accurate diagnosis on my part as well as a good bit of contradicting information on the web.
The rundown:
1984 R100RT
Siebenrock 1070cc Big Bore Kit w/ Asymetrical Cam
Alpha Ignition System v3 (Hall sensor and ignition module: 20deg to 29deg)
450w Generator and Diode Board (EME)
Lectron Slide Carbs
NGK 5k Wires
Bosch Super RO751 Plugs
Bosch 6v Coils
Valeo Starter
New Battery
Mega Ton mufflers (not that it has a huge impact beyond the noise)
Im trying to make sure I have all the electricals correct beofre I go diving into tuning the carbs further. What should total timing be for this application?
I realize this is probably considered "hot rodded". Just looking for a little more information/input, primarily due to the amount of variables and my limited knowledge.
Any input would be appreciated.
Side note: As far as concerns with the Lectron Carbs and why they are on the bike... The bing on the right cylinder had a fracture causing a consistent rich condition previously. This lead to the bike not running on the one cylinder. I have used Lectrons on other bikes in the past and "tuning" them is the easiest of any carb I've used prior hence the current installation of them.
Good evening all,
I am experiencing a flat spot in the power band at about 3800-4000rpm in neutral and 4000 and above under load. In neutral, once past the small hiccup, rpms rapidly increase. Under load, in first gear, acceleratiion is more aggressive than stock. At 4000 it will continue to accelerate, just drastically slower to about 5500 where it doesnt have enough "grunt" to accelerate further. If I upshift and the RPM drops back to the 3000 range, will continue to accelerate as if nothing was wrong untill the 4000 rpm mark. Any gear above 1st will not accelerate past 4500.
The bike starts and idles fine, albiet with a bit of a lope to it. I currently have the idle speed set at about 1,200rpm which is a tad high for these. Its set that way to balance between happy bike and stable carbs.
Carbs are sync'd, Ignition system is new, Engine is, for all intent and purposes, rebuilt.
What I believe I'm running into is a lack of knowledge for accurate diagnosis on my part as well as a good bit of contradicting information on the web.
The rundown:
1984 R100RT
Siebenrock 1070cc Big Bore Kit w/ Asymetrical Cam
Alpha Ignition System v3 (Hall sensor and ignition module: 20deg to 29deg)
450w Generator and Diode Board (EME)
Lectron Slide Carbs
NGK 5k Wires
Bosch Super RO751 Plugs
Bosch 6v Coils
Valeo Starter
New Battery
Mega Ton mufflers (not that it has a huge impact beyond the noise)
Im trying to make sure I have all the electricals correct beofre I go diving into tuning the carbs further. What should total timing be for this application?
I realize this is probably considered "hot rodded". Just looking for a little more information/input, primarily due to the amount of variables and my limited knowledge.
Any input would be appreciated.
Side note: As far as concerns with the Lectron Carbs and why they are on the bike... The bing on the right cylinder had a fracture causing a consistent rich condition previously. This lead to the bike not running on the one cylinder. I have used Lectrons on other bikes in the past and "tuning" them is the easiest of any carb I've used prior hence the current installation of them.
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