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TOPIC: Re:HSR 42 Information
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Re:HSR 42 Information 3 Years, 5 Months ago
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Oh the anticipation must be killing you!!!  |
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Erbman02 (User)
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Re:HSR 42 Information 3 Years, 5 Months ago
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smhowse wrote:
I moved the TPS again and checked it 699-701 checked float level good at 19mm
It's too late to ride tonight so I will ride to work tomorrow and see how it is.
Steven
Whatta ya mean too late. ever hear of a midnight run? LOL Some of my friends and I do a BCOD ride (butt crack of dawn)lol. we start before the sun rises, head for breakfast, then a ride after.
the 756 ohms was fine, don't be surprised if the ohm's drift a little, it will happen. These potentiometers are about 5 to 6k ohms in only a half turn, just moving it a hair could be 100 ohms.
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Re:HSR 42 Information 3 Years, 5 Months ago
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smhowse wrote:
There is no part number for the HSR42 unless you buy the Speedster one from Yamaha. Maxair Engineering sells a kit setup that you can buy with the correct cables, tps mod etc. if you don't want to mess with it.
Otherwise just find a Mikuni HSR42 carb, mod it for the tps or add voes and you are good to go.....er so to speak....I'm still working on it 
Steven
thanks i looked on ebay and see some different ones, when i looked again and closer it was brackets/ect included for each model. the carbs themselves where the same.
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Re:HSR 42 Information 3 Years, 5 Months ago
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Erbman02 wrote:
Whatta ya mean too late. ever hear of a midnight run? LOL Some of my friends and I do a BCOD ride (butt crack of dawn)lol. we start before the sun rises, head for breakfast, then a ride after.
When I did my "midnight" run the other night my neighbor came over the next day... dunno exactly what he meant about a lawyer and a shotgun....   guess I shouldn't have reved and burned out of the driveway
Also it was 45 degrees 
Rode to work this morning little warmer 58degrees and she ran great!! I cannot believe the difference in sound! The throttle response is spot on, no hestitation anymore. The increase in power is awesome! like every performance mod I've done this is a must have! 
So I will say with confidence if you want a fast bad R* just add the following:
2n1 type exhaust
BAK
Hand ported manifold (get from Curt  )
Dyna 3000
31 tooth pulley
Barnett clutch plate
Iridium plugs
Progressive front springs with 10wt fork oil
Progressive rear spring
AND.. Mikuni HSR42!!
And it will be hard to hold onto the handlebars on acceleration!
Steven
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Last Edit: 2009/12/02 12:39 By smhowse.
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Re:HSR 42 Information 3 Years, 5 Months ago
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Re:HSR 42 Information 3 Years, 5 Months ago
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slothy wrote:
smhowse wrote:
There is no part number for the HSR42 unless you buy the Speedster one from Yamaha. Maxair Engineering sells a kit setup that you can buy with the correct cables, tps mod etc. if you don't want to mess with it.
Otherwise just find a Mikuni HSR42 carb, mod it for the tps or add voes and you are good to go.....er so to speak....I'm still working on it
Steven
thanks i looked on ebay and see some different ones, when i looked again and closer it was brackets/ect included for each model. the carbs themselves where the same.
The brackets are only for Harley models there is not one made for the R* application (speedster is the exception) so you can just buy a stock Mikuni HSR42 and read the tech article I'm writing and bam instant HP!
Steven
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Erbman02 (User)
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Re:HSR 42 Information 3 Years, 5 Months ago
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smhowse wrote:
Rode to work this morning little warmer 58degrees and she ran great!! I cannot believe the difference in sound! The throttle response is spot on, no hestitation anymore. The increase in power is awesome! like every performance mod I've done this is a must have!
Steven
The tps ohms was so low that the signal to ignition module caused the timeing to be way off. Did you readjust the pilot screw, after the bike was fully warmed? probably will have to adjust idle too since it would be a significant change to pilot screw. usually a tweak to pilot screw idle is still good.
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Re:HSR 42 Information 3 Years, 4 Months ago
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Does the Yost tube make a noticable difference ?
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We\'re gonna need a bigger boat . . . . .
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Re:HSR 42 Information 3 Years, 4 Months ago
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From what everything I researched yes, (which was quite a bit)it does. Thats why I went ahead and just bought one and put it on from the start.
I think more than anything it helps with MPG.
Steven
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Erbman02 (User)
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Re:HSR 42 Information 3 Years, 4 Months ago
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Ruprect wrote:
Does the Yost tube make a noticable difference ?
the Yost tube replace the extender tube that the main jet screws into, tho they claim it helps in all ckts from idle to wot, I can't see that happening in the idle ckt due to the vacuum can't pull gas from the main jet. However, what I saw and see is a slightly smoother acceleration from off idle to wot. The tube helps to atomize the gas much more efficiently than the extender tube. I was able to lower my main jet from a 165 to a 160. the better the gas can be atomized when it goes into the piston camber, the better the combustion will be. large drops of gas don't burn. If you go this route, get the one that uses the Mikuni jets, this one does not come with additional jets, uses the same as in stock carb, and there is no tube for stock carb btw. and if you go this route, it appears as if it does not seat all the way down, don't force it, it is that way by design.
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