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lectron vs mikuni hsr42
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10.5 terror View Drop Down
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Posts: 29 		  Quote 10.5 terror Quote  Post ReplyReply Direct Link To This Post Topic: lectron vs mikuni hsr42
    Posted: 05 November 2009 at 6:10pm
ok got my gsxr 1100 draw thru turbo setup running with the lectron with power jet   that the system came with  bike idles good and runs good under boost    
 
im going to street strip this bike and i just dont think the lectron is gonna cut it as im sooting plugs up and bike has bogging problems when rolling on the throttle in higher gears at low rpms cruising down the road... if u down shift it and get the rpms up it its great    and every now and then the bike wants to die after i get in it and let off of it
i dont care to much for the s/s style carbs
 
i like the mikuni hsr 42 think that would work well for me
any thoughts.. and where can i buy one at for a a good price ??/
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  Quote Guests Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2009 at 6:29pm
Check with Mr. Turbo.  They've done a great job with this carb in Turbo applications.
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Posts: 17 		  Quote Big_T112 Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2009 at 6:49pm

The HSR 42mm Mikuni was a replacement upgrade on a lot of Harley's  you can grab one on Ebay pretty cheap.  run a 15 pilot and a 230 main jet.  Get the high pressure needle and seat from Mr Turbo and if you do a lot of wide open throttle grab the bowl extender too.  Mine ran like a normal streetbike.  You could race/ride it anywhere. 

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geek View Drop Down
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 05 November 2009 at 8:56pm
Mr. Turbo is a great source for sure.  
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JayD View Drop Down
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Posts: 58 		  Quote JayD Quote  Post ReplyReply Direct Link To This Post Posted: 06 November 2009 at 9:45am
The Lectron is great for race only, go with the Mikuni for street / strip.
2007/2008 PMRA Pro Street/Outlaw Champion...with a draw thru turbo
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 07 November 2009 at 3:41pm
I wonder just how far this little HSR will take me.     I am way past any stock jet sizes and have the fuel pressure so tight that it drips coming out of the burnout box.  Using C16 was key!  I am still able to keep things very cool with it and suspect moving past 30 PSI is not going to be a problem.  

Used to be a lot of chat about this carb on this site.  I wonder how far others have pushed this little carb.
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Posts: 58 		  Quote JayD Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 10:03am
I changed from the 42 Mikuni to the 48 Mikuni carb and started drilling my on jets. I never had any problem running the bowl dry even without the bowl extender, just got to the point I couldnt make the jet any bigger. I made around 20lbs with a T-3, T-4 style turbo. But that still put my outlaw in the 7's at 185+.
2007/2008 PMRA Pro Street/Outlaw Champion...with a draw thru turbo
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 10:13am
I am confused.   Were you running in the 7's with the 48 or the 42?       If you were doing this with the 48,  what sort of times/MPH were you running with the 42?
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Posts: 58 		  Quote JayD Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 10:29am
I went into the 7's with the 48. I never ran the 42 on my Outlaw. I changed over to the 48 when I was still running a shootout style chassis. The 48 was a big improvement over the 42. I cant remember how fast I went with the 42 but when I changed to the 48 it picked up everywhere. Here's a few links to my bike running now with the Lectron. 
 
2007/2008 PMRA Pro Street/Outlaw Champion...with a draw thru turbo
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geek View Drop Down
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 12:17pm
That's flying!  First video was fun to watch!! Good save!

Did you see an improvement going to the Lectron? 
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JayD View Drop Down
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Posts: 58 		  Quote JayD Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 12:22pm
Yep, but it's a 50mm.
2007/2008 PMRA Pro Street/Outlaw Champion...with a draw thru turbo
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Posts: 3467 		  Quote Marc Powe Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 1:28pm
Good numbers for a draw/thru with no Nos on a small tire.  Thumbs Up
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Marc Powe View Drop Down
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Posts: 3467 		  Quote Marc Powe Quote  Post ReplyReply Direct Link To This Post Posted: 08 November 2009 at 1:29pm
And no bars..............Wink.
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Tim Rinkerman View Drop Down
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Posts: 655 		  Quote Tim Rinkerman Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2009 at 7:36am
I ran 7.90's at 165-170 with a Mikuni 42... In a 700 lb. car tire draw through Kawi...
Some's good,more's better,and too much is just right....
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geek View Drop Down
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 09 November 2009 at 9:04am
Originally posted by Tim Rinkerman

I ran 7.90's at 165-170 with a Mikuni 42... In a 700 lb. car tire draw through Kawi...
 
Hey Tim, I assume you gave up using the 42 after this to get into the mid 7's.  What was the problem with the 42?   Same problem as above (jetting)?    
 
If jetting is the limit, seems like Jeff Marsh had posted about using a secondary jet with the 42.   
 
There is a company here that makes a pickup for the HSR to allow you to use the Holley jets. 
 
 
 
 
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Posts: 655 		  Quote Tim Rinkerman Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2009 at 1:05pm
There was no problem with the 42, Kevin at FBG told me I would go faster with a Lectron...and I did..
  BTW. I did also use a Dynojet (Thunderjet, whatever,..)with the Mikuni...
Some's good,more's better,and too much is just right....
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geek View Drop Down
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 11 November 2009 at 10:04pm
Originally posted by Tim Rinkerman

There was no problem with the 42, Kevin at FBG told me I would go faster with a Lectron...and I did..
  BTW. I did also use a Dynojet (Thunderjet, whatever,..)with the Mikuni...


Do you remember what needle jet you were using?  
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Tim Rinkerman View Drop Down
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Posts: 655 		  Quote Tim Rinkerman Quote  Post ReplyReply Direct Link To This Post Posted: 13 November 2009 at 12:05pm
All I remember was the main jet..220, sometimes 230.....Tim
Some's good,more's better,and too much is just right....
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geek View Drop Down
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Posts: 1943 		  Quote geek Quote  Post ReplyReply Direct Link To This Post Posted: 14 November 2009 at 9:45am
Thanks Tim.  Makes sense.  Seems like the stock needle jet was pretty small.   Seems like the  230 was the upper end of what they offer.       I am using drilled ones without a power jet thing. 
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