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Sportster Motorcycle Engine Conversions Advice, questions, and tips for 1200, 1250, 1340, 1450 etc... for Sportster and Buell motorcycle engine conversions

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  #51  
Old 5 Days Ago
jkinkade jkinkade is offline
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Sportster/Buell Model: XLH 1200 2003
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Originally Posted by splineman View Post
Hey jkinkade.
How's the tuning/running in going?
How's the heat control?
Cheers



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Hey Nigel . have done 1,538k (961.75 miles ) still run-ing in, my friend said run in longer, when he say's I have enough miles up ( going easy ) he will let me know then will put a better clutch in & fine tune on his DJ250i, I been riding it down to the snowy mountains & Deep South coast , New South Wales . yesterday & today felt freezing cold to me on the bike , was 18c today down there was 23c here at home & 30c in Sydney, so has not been too bad. motor not too hot. gear box really good can't wait to be able to flat shift ( by foot ) the Ohlins rear shocks firm same with forks and no chicken strips on tires. Snowy Mountains HWY a good riding road, but if take side tracks have to be careful of wild horses ( Brumbies ) if anyone wants free horses!!

you been getting any riding in on your 90' Sporty?
cheers
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2003 XL1200
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  #52  
Old 5 Days Ago
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splineman splineman is offline
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Location: New Zealand
Posts: 913
Sportster/Buell Model: XL1200C
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Good to hear it's going well. Sounds good.

Did a rally recently in North Island, 4 points rally to 4 corners of the island. Poker run of sorts. 2700km or so bike runs great.
Only problem bloody speed cameras all over the place now. $30 bill in the mail thanks very much!!! Don't even need the coppers any more.
Big bore sportsters are great. I also got my Ohlins rear shocks lengthen to 13.25" to stop grinding my bike away haha.
Take care.
Cheers

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  #53  
Old 4 Days Ago
jkinkade jkinkade is offline
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Join Date: Jan 2016
Location: on the Australian east coast
Posts: 555
Sportster/Buell Model: XLH 1200 2003
Sportster/Buell Year: 2003
Reputation: 116365
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Originally Posted by splineman View Post
Good to hear it's going well. Sounds good.

Did a rally recently in North Island, 4 points rally to 4 corners of the island. Poker run of sorts. 2700km or so bike runs great.
Only problem bloody speed cameras all over the place now. $30 bill in the mail thanks very much!!! Don't even need the coppers any more.
Big bore sportsters are great. I also got my Ohlins rear shocks lengthen to 13.25" to stop grinding my bike away haha.
Take care.
Cheers

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Hey thank's, wow sound's like a great rally!! 2,700km is a good run!!
I hate speed camera's & I think it's a $ grab, as they don't really know they got the right person, as they need to stop you to know that.
in this state all speed camera's well sign posted, with two sign's before and one just after the speed camera ( both fixed and mobile ) but the cops have speed guns & radars in there petrol cars ( in this state ) ( all the states in Australia different ) but I don't think any fines $30 I think they start about $100 & go up.
How many day's did the rally take? Also how far do you go before refilling your tank?
you take care too!!
cheers
for me frustrating runing in, but will be worth it at the end!!
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  #54  
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splineman splineman is offline
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Join Date: Apr 2011
Location: New Zealand
Posts: 913
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I spent 3 days on the rally.
Bike is pretty good fuel economy on cruise. Getting about 300km to reserve depending how many logging truck got to blast past haha.
I find the iron barrels a bit hotter than stock, oil running about 200/210f on the open road, used to be 180f or so in the oil bag.
Use Spectro Golden semi synth 20-50.
Not Hot like Oz here....30c is pretty rare it's an island lol.
I think you're being wise with careful run in. I'm keen to see how the 88" goes fullon.
Cheers.

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  #55  
Old 4 Days Ago
jkinkade jkinkade is offline
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Join Date: Jan 2016
Location: on the Australian east coast
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Sportster/Buell Model: XLH 1200 2003
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Originally Posted by splineman View Post
I spent 3 days on the rally.
Bike is pretty good fuel economy on cruise. Getting about 300km to reserve depending how many logging truck got to blast past haha.
I find the iron barrels a bit hotter than stock, oil running about 200/210f on the open road, used to be 180f or so in the oil bag.
Use Spectro Golden semi synth 20-50.
Not Hot like Oz here....30c is pretty rare it's an island lol.
I think you're being wise with careful run in. I'm keen to see how the 88" goes fullon.
Cheers.

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Hey good economy! well weather changes so might get a very hot day & next day cool, out in centre Australia Hot & Dry, up the top mostly always hot, ( hot & wet or hot & dry ). I bought my Sporty off a lady that lived right up Far North Queensland & I road it home to far south coast NSW. was up at Cairns. when I get up there it was 27c the locals said it's freezing!! I though it was fantastic as seemed to be 27c all the time day & night & was low humidity ( normally in wet season high humidity ) I was there in May. loved the ride home & bike never missed a beat, but as I was used to a Buell Cyclone it felt like a slug. at one part on way home was 375km between servo's, but a long range trucker told me where to get fuel.
I have got 1,793km ( 1,120 miles ) on new build now feels better all the time but still taking it easy as stock clutch & still has spring plate, but no worries want to wear pistons in more.
by the feel I will be able to give it a run down quarter no problem as shock and forks very hard to firm, but I'll only take her down quarter mile to get a time and speed as reference.
if you do it all the time you crack things and knock bike around I want to look after it so it lasts a long time.
what carb are you using? & how do you like it?
myself I have the Bobby Wood modified CV44 Bobby call's the Rebel 43.5, I have had it for ages never really checked AFR with it, but this time we will do that on friends DJ250i , just to check it gets enough gas at higher rev's, some Carb's good but at high rev can't give enough gas. problem if it needs more gas up high the body is a bit thin to use a thunder jet. in that case I might have to go to an S&S E, but hope I can keep this carb as It feels nice.
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  #56  
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splineman splineman is offline
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Join Date: Apr 2011
Location: New Zealand
Posts: 913
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Sportster/Buell Year: 2005
Other Motorcycle Model: Honda GB400
Other Motorcycle Year: 1987
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I'm using a Mikuni HSR 45. I set it up with a wideband O2 sensor in a welded bung on my front header. I use an MTX-L from innovate for AFR.
Mikuni is really good. Great throttle response and fuel economy. Holds about 12.4 at full throttle......13.8 cruise low throttle for economy.
Joe Minton has written some good articles on setting them up properly.
This is the setup Hammer recommended to me and no regrets at all.
Your carb sounds good and you have more experience than me with Harley so stick with what you know if it's working.
One thing I've found is the added grunt of the big engine accentuates and handling issues you may have. The rubber sportsters aren't the most stiff bikes around so that's a challenge. Need to look are everything and set up properly. Still not like my Triumph tho haha but love the sporty.
Cheers.



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  #57  
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jkinkade jkinkade is offline
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Join Date: Jan 2016
Location: on the Australian east coast
Posts: 555
Sportster/Buell Model: XLH 1200 2003
Sportster/Buell Year: 2003
Reputation: 116365
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Quote:
Originally Posted by splineman View Post
I'm using a Mikuni HSR 45. I set it up with a wideband O2 sensor in a welded bung on my front header. I use an MTX-L from innovate for AFR.
Mikuni is really good. Great throttle response and fuel economy. Holds about 12.4 at full throttle......13.8 cruise low throttle for economy.
Joe Minton has written some good articles on setting them up properly.
This is the setup Hammer recommended to me and no regrets at all.
Your carb sounds good and you have more experience than me with Harley so stick with what you know if it's working.
One thing I've found is the added grunt of the big engine accentuates and handling issues you may have. The rubber sportsters aren't the most stiff bikes around so that's a challenge. Need to look are everything and set up properly. Still not like my Triumph tho haha but love the sporty.
Cheers.

hey sound's good, I have an Inovate and welded a bung in front pipe on my last, performance, Harley was a Twin Cam 88", your set up might be smaller. the one I have too bulky. I was trying to use at drag strip as a good friend & very smart tunner. told me that's the way to go. but , even though he rides an XB Buell, he is a car man (LOL) . I disagreed it still have it laying around. I used the drag strip to tune the Twin Cam 88 Dyna carb, what gave me the highest trap speed then I left the tune like that. road on street. after breaking a rear rubber mount at the track up near 120mph, & not coming off, but was close. I braced the rubber mount at the rear, helped handling. did you ever check the Mikuni afr at high rev under load?
I used this Bobby Wood carb on the Twin Cam, & used an S&S D with thunder jet and adjustable air bleed, & a CV51 mounted to same manifold as I used to run the s&sD on it had a spacer to give manifold a lot more air space. I got same trap speeds with the CV51 as with the S&S D but it was easier to ride to the track with CV51. but I never did get to test the afr on any of them at high rev under load.
But now as my friend has DJ250i that has load control & afr & a really good dyno room Map's a lot of EFI & ride by wire Harleys . I thought I will check the high speed afr, as he showed me a lot of Carb bikes he tunes. you can't always get both perfect low speed & perfect high speed afr. I never worried before, I thought it would be interesting to find out. In forty plus years on Harley's trying to go quick & fast. I have never used a Mikuni so not experienced with them. Had SU Eliminator ( was ok ) Carl's Speed Shop 2" SU ( was good just had to keep fine tuning ) S&S L series ( good old style s&s ) S&S duel throat ( did not care for it )S&S B ( good carb!! ) s&s D ( killed everything in it's day!! road a 98 inch shovel kick start only for 15 years with a S&S D & TJ + adjustable air bleed ) S&S G ( I thought the G might have more go at low rev than the D but I was wrong ) then I moved to CV carb's liked them. but have to see if this Bobby Wood Rebel 435 can give the 88" gas up high ( will test on dyno. in the end all a carb can do is give air & gas, but your motor can only use so much air, giving it more air than it can use won't help. ( unless it's Nitro!! LOL )
now have to run this motor in! but I like this Sporty more than the Twin Cam Dyna!! It's a bit like the old Shovel but a lot smoother & quicker, that Old Shovel still goes & new owner put a 6 speed in, it does quarter mile in 11's still.
enjoy your ride , sounds like it's making you happy!! your Sporty is improved product, the Triumph ....... I can tell you about Triumph's!! I never owned one and when I first started riding a Harley here in Australia everyone road Triumphs or jam bikes and tried to knock Harleys. now a lot of them are on Harleys. try to say " Oh but the new one's are better!! " LOL. I just say are they.



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