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i installed the wiesco 1190 kit and wondered where i should start with my jets. it's a 11sf. i live at 580 feet above sea level. thanks in advance.
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Start at the stock jet sizes and check plugs frequently and adjust as needed.Nathan
KD9ARL
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1978 XS1100E
K&N Filter
#45 pilot Jet, #137.5 Main Jet
OEM Exhaust
ATK Fork Brace
LED Dash lights
Ammeter, Oil Pressure, Oil Temp, and Volt Meters
Green Monster Coils
SS Brake Lines
Vision 550 Auto Tensioner
In any moment of decision the best thing you can do is the right thing, the next best thing is the wrong thing, and the worst thing you can do is nothing.
Theodore Roosevelt -
Stock
+1 If everything else stock? If so I would starts with stock jets. You have increased the volume bt 9.25% so you will move more air, but you also move more air as the rpm increses on the stock bore and the carb jets handle that fine with the stock exaust / timming etc. then see how it runs and adj as /if needed
Originally posted by natemoen View Post1979 XS1100 Special (Mad Max, OEM) Current
1980 XS1100 Special
1990 V Max
1982 KZ750 LTD Twin
1986 700 FZR Yamaha Fazer (faster then expected)
1979 XS750 Special (my 1st Special)
1974 CB750-Four
Past/pres Car's
1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8Comment
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1190 kit
i have pod filters and 4 into 1 pipe. also have a set of 1980 carbs i can use if they are better. thanksComment
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In that case
In that case, I would ask Phil and others, Phil has made a chart (couldn't find a link
) that he has said works well for bikes with mods as far as jets go
Originally posted by lucky50 View Post1979 XS1100 Special (Mad Max, OEM) Current
1980 XS1100 Special
1990 V Max
1982 KZ750 LTD Twin
1986 700 FZR Yamaha Fazer (faster then expected)
1979 XS750 Special (my 1st Special)
1974 CB750-Four
Past/pres Car's
1961 Catalina 389/1970 Torino GT 351/1967GTO 12to1 comp./ Roller cam/ T-10/ 456 gear/Tri-power/1967 GTO 400, 1969 Camaro, 1968 Z28, 2001 BMW M Roadster 0 to 60 in 4.5 sec. Jaguar XK8Comment
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Stick with the early carbs if running a non-stock combo as they're easier to adjust...Originally posted by lucky50 View PostFast, Cheap, Reliable... Pick any two
'78E original owner - resto project
'78E ???? owner - Modder project FJ forks, 4-piston calipers F/R, 160/80-16 rear tire
'82 XJ rebuild project
'80SG restified, red SOLD
'79F parts...
'81H more parts...
Other current bikes:
'93 XL1200 Anniversary Sportster 85RWHP
'86 XL883/1200 Chopper
'82 XL1000 w/1450cc Buell, Baker 6-speed, in-progress project
Cage: '13 Mustang GT/CS with a few 'custom' touches
Yep, can't leave nuthin' alone...Comment
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1190
thank you for the informationComment
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Hey Lucky,
In the MISC forum is the Jetting Guide for mods, and when combination of mods there is a little simple math to do...but again these are just guides/starting points to try, but still need to monitor your plugs.
I've done the smaller 1179 kit, but also have 4-1 pipes and Indy filters, with later 81 carbs, I'm running 117.5 mains across all. My dyno run after breakin showed that I could have possibly put in 1 more size to 120's, but I've got good color and performance to redline, so I haven't tried the larger size. I had been running the 42.5 pilots because of one that was corroded/frozen in place 10 years ago, and I didn't have the tools or confidence to attempt to remove it. This last year I took a small drill and then easy out to it and was able to get it out, so I put in the 45's that I had ordered 10 years ago!
I ran OEM jets (110's) for 9 years with the 4-1 pipes alone with stock airbox, but after the big bore and Indy Pods I didn't want to take any chance of burning a hole in my new pistons, so I followed the jetting guide! YMMV!
T.C.T. C. Gresham
81SH "Godzilla" . . .1179cc super-rat.
79SF "The Teacher" . . .basket case!
History shows again and again,
How nature points out the folly of men!Comment
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