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Old 05-04-2016, 03:02 PM   #1 (permalink)
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New big bore kits for the Street 500 & 750

Hey guys!! We are new to the forum and i wanted to get your opinion on the new 550 and 800 big bore kits we have for the Street 500 and 750's. What do you think??
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Old 05-04-2016, 03:37 PM   #2 (permalink)
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bbally is reading this now saying WTF is this? bbally is reading this now saying WTF is this?
1000 or stay home.

I own an XG 750
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Old 05-04-2016, 04:01 PM   #3 (permalink)
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Looks like those are press in sleeves, so 1000 might need completely new water jackets to be case. Do they bump the compression up or any other performance increases?

They at least make a good replacement when you have a scored cylinder.
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Old 05-04-2016, 05:05 PM   #4 (permalink)
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You are right you would need a new outter casting to go that big and you would also have to bore the cases for a 1000cc. We did the big bore kit, air cleaner, Bassani Slip on, and Power commander and went from 52hp and 43tg to 60hp and 48tq. We are waiting for some cams to come in and we are hopping soon!! As for compression we went from stock 11:1 to 11.5:1cr
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Old 05-04-2016, 09:10 PM   #5 (permalink)
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So this is the biggest bolt on kit you can get without risking internal failure from metal being too thin.
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Old 05-04-2016, 09:24 PM   #6 (permalink)
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bbally is reading this now saying WTF is this? bbally is reading this now saying WTF is this?
So what price to add 8 HP?
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Old 05-05-2016, 09:12 AM   #7 (permalink)
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Yes Greg this is as big as you can go without damaging the sleeve. As for price the kit is $918.95
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Old 05-05-2016, 03:10 PM   #8 (permalink)
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Greg - If you wanted to be the first on the board to try them, I would be happy to give you 10% off!

Note: This is a bolt on kit. The sleeves are not press in sleeves, they all bolt together.
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Old 05-06-2016, 08:56 AM   #9 (permalink)
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that's $114/HP? Ouch! I thought my 103 TC was expensive at $60/HP for a Stage IV build? Will a cam upgrade add much to the performance? Overhead cams?? why doesn't the MoCo just build a 1000cc version of the 750cc?
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Old 05-06-2016, 12:30 PM   #10 (permalink)
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It's a 20% gain for that displacement. It is an overhead cam and we are waiting for a cam to come in and see what it does. Also there is no head work done to this either and that is coming soon as well. Not sure why the MoCo did not go that big to begin with... good question!
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Old 05-06-2016, 02:45 PM   #11 (permalink)
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Quote:
Originally Posted by Revolution1312 View Post
It's a 20% gain for that displacement. It is an overhead cam and we are waiting for a cam to come in and see what it does. Also there is no head work done to this either and that is coming soon as well. Not sure why the MoCo did not go that big to begin with... good question!
Because of the target demographic the bike was developed for;

Countries with CC stepped licenses, countries with lots and lots of riders doing very short distance commutes and as a smaller European college ride.

And they sell it in the USA to the dealers for the motorcycle courses. Plus they are hoping the hipsters might like it. Judging from the ads I have seen.

They sure hit the size on the head as it sells like mad overseas.

Bottle the thing for cheaper HP on call when you need it.



The real problem you run up against is the fact this one is a single overhead cam. If this followed the Revolution with the double cam you could flow the shitt out of the system. Single, not so much without boost.
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Old 05-07-2016, 11:43 AM   #12 (permalink)
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Quote:
Originally Posted by bbally View Post
Because of the target demographic the bike was developed for;

Countries with CC stepped licenses, countries with lots and lots of riders doing very short distance commutes and as a smaller European college ride.

And they sell it in the USA to the dealers for the motorcycle courses. Plus they are hoping the hipsters might like it. Judging from the ads I have seen.

They sure hit the size on the head as it sells like mad overseas.

Bottle the thing for cheaper HP on call when you need it.



The real problem you run up against is the fact this one is a single overhead cam. If this followed the Revolution with the double cam you could flow the shitt out of the system. Single, not so much without boost.
The Street need to match the price point of the Asian scooters it needs to beat out for sales. And I'm thinking that once the Asian trade deal is done, Harley has that covered.

My sister just toured the MoCo plant in India a couple of months ago. A large part of it is unused, but partially equipped. No official comment as to it's future, but unofficially it's where the two new export scooters will be built after the Asian Trade deal passes. An Asian assembled Street for the US and another scooter currently built somewhere else. They also showed the tour drawings of future planned construction. Several large factory type buildings and an office building. I'm thinking the MoCo's union might be about to get walked on, again.
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Old 05-09-2016, 11:31 AM   #13 (permalink)
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bbally you are correct it is a single cam and for sure it would be way better with duels!!

Last edited by Revolution1312; 05-09-2016 at 11:36 AM.
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Old 05-09-2016, 11:33 AM   #14 (permalink)
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Big bore for a sewing machine? Well, ok then.
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Old 05-09-2016, 01:28 PM   #15 (permalink)
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I see it more as a repair option, but some people will push these engines to the limit. I think a kit to bring the 500cc up to an 800cc machine would be attractive to some buyers. Suggest some pipes and intake and cams to really make a huge difference in power.
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