More bottom end

[mooks420n]

I have a 1981 GS 1100EX ,runs good etc., The bike pulls slow but steady up to about 5- grand then it really starts to groove, the prob is that by the time power-band kicks in I am moving over one hundred miles an hour and things start happening way quicker.
The bike is totally stock except for the 4 into1 hindle exhaust. how can I get more bottom end? I've read somewhere to advance the timing to 15 degrees,but unsure how to go about it. I have read that the canadian ex's were tuned mild, what are the stock timing settings?So how much more do I need to advance it?And how?
Over the winter I am planning on freshening up the beast with new rings carb rejetting (or possibly a carb swap if I can find some 36mm flats),and thinking of possibly going electronic ignition(any cons?) but my main concern is more snap off the bottom,so any advice will be greatly appreciated thanks in advance

[focus frenzy]

your 81 1100e already has electronic ignition.

a switch to the cams from a 83 1100E would help the low end power.

the peaky power band is normal for a GS.
the stock electronic ignition is not adjustable without modifications.

[mooks420n]

your 81 1100e already has electronic ignition.

a switch to the cams from a 83 1100E would help the low end power.

the peaky power band is normal for a GS.
the stock electronic ignition is not adjustable without modifications.

Thanks F F ,

Had a feeling it was electronic just had not looked yet,Will going aftermarket (Dyna) ignition make much of a difference? The bike runs fine with the stock.

The cams can bolt right on without any mods or part changes I can assume? thanks again

[focus frenzy]

they will go right in, but you may need the cam sprockets.
cross referencing the part numbers will tell for sure.

carb re-jetting will be needed.
the 83 cams have .5mm more lift and the intake cam is advanced faster.

more low-midrange grunt and a bit more on top!\\/

a aftermarket ignition might help, my 83 1100E originally had the second generation system that advanced the timing electronically, but when I bought it, it had been changed over to a Dyna S system with mechanical advance.

[Billyboy]

I have a highway rear sprocket, and it really steals the starting grunt. Now that I live in town I'll be switching back to the 42 tooth.

[chef1366]

http://cgi.ebay.com/ebaymotors/ws/eBayISAPI.dll?ViewItem&rd=1,1&item=110037992408&ih=001&sspagename=STRK%3AMEWA%3AIT

Adjustable cam sprockets\\/

[mooks420n]

So are the cams cams a nesessity? looks like it will be a jetting thing, any ideas on the jets I should try first?(stock 34 mm) How can my timing be adjusted? by going the dyna S route with mechanical advance? I appreciate the help, will help formulate a game plan over the winter.

[80GS1000]

I have a highway rear sprocket, and it really steals the starting grunt. Now that I live in town I'll be switching back to the 42 tooth.

I agree with Billyboy. Are you running the stock gearing? You may want to change your sprockets to give you more acceleration on the bottom end.

[SqDancerLynn1]

Degreeing the cams to 106* seems to be the best seting sugested. points,dyna, or stock elect Makes no difference if they are working properly

[mooks420n]

Degreeing the cams to 106* seems to be the best seting sugested. points,dyna, or stock elect Makes no difference if they are working properly

this is for the stock cams? is this machineing or a setting? thank you

[rphillips]

A smaller collector on a 4 into 1 exaust will create more torque (bottom end power). V&H 4 into 1 pipes, years ago, came with 3 reducers that fit in the collector. They were 1 1/4", 1 1/2", 1 3/4", & the pipe was 2" with no reducer. The smaller the collector, the more torque, & less top end, the larger the collector, the more high rpm power, but less torque. I just went out to the garage & measured the collector on my Yosh pipe, it is 3", really made for max. top end, but I have made a reducer for it that is 1 1/2", cause I love torque, use torque all the time. The older I get, I use the high rpm power less & less & less & less.

[KEITH KRAUSE]

Degreeing the cams to 106 is a good compromise between low/mid-range torque and top end power. The powerband is wider and more usable. 104 even better if you really want the most torque. You'll need adjustable sprockets or slot the existing sprockets with a Dremel/file.

[mooks420n]

Is there some easily accessible literature on degreeing the cams ? I am not sure what it entails thanks again for all the info . M

[mooks420n]

ok got it


hxxx://www.starracing.com/Cam%20Lobe%20Center%20Explained.htm

[mooks420n]

your 81 1100e already has electronic ignition.

a switch to the cams from a 83 1100E would help the low end power.

the peaky power band is normal for a GS.
the stock electronic ignition is not adjustable without modifications.

my gs mechanic says my ignition has a timing plate and springs/weights he has an 1980 gs1100ex is ignition different on my 1981 1100ex? what mods need to be done to stock ignition?