October 18th, 2019, 06:56 PM | #1 |
ninjette.org guru
Name: J
Location: Tucson
Join Date: May 2017 Motorcycle(s): 250r Posts: 254
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Piston charts??
Is there somewhere where I can find different size Pistons with their measurements??
I know it's a long shot but I'm building a custom engine and I'm sort of new to the custom scene, I have done mods in the past but it's from things already made for the engine. I'm just looking for a certain size piston. Stock piston size I'm working with Piston Diameter: 75mm Piston Height: 46mm Compression Height: 22.5mm Wrist Pin Diameter: 17mm Wrist Pin Length: 57mm Or better yet can someone help me with how to search for a specific piston size? Last futzed with by NaturalFlavored; October 19th, 2019 at 07:43 AM. |
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October 19th, 2019, 12:12 AM | #2 | |
ninjette.org member
Name: Garry
Location: Bungendore Australia
Join Date: Jan 2019 Motorcycle(s): GPX250 1989 model and 1990 model Posts: 98
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Quote:
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Perpetua Culpa Alterna Vagus |
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October 19th, 2019, 12:39 AM | #3 | |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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Quote:
As for piston sources, I usually peruse Wisco and JE piston catalogues: http://www.wiseco.com/Powersports/Pistons.aspx https://www.jepistons.com/Catalogs/P...rts/Index.aspx Usually you can find something that's matching. If not, you can always fill out form and get pistons made to your exact specs. I usually go to Wossner or Arias for that. Looks like Honda Helix CN250 pistons match your specs. http://bradsscooters.com/partsstore/...-piston-kit-2/ https://www.partsforscooters.com/180...iston-Kit-72mm https://www.amazon.com/Piston-Honda-.../dp/B06XQGHFQ7 https://www.ebay.com/itm/HONDA-HELIX...T/372644721467 https://www.ebay.com/c/14031241008 |
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October 19th, 2019, 07:44 AM | #4 |
ninjette.org guru
Name: J
Location: Tucson
Join Date: May 2017 Motorcycle(s): 250r Posts: 254
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Thanks for the info, yeah it's the motor I'm working with. I will browse through those websites and see what I come up with.
Thanks for the help. |
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October 19th, 2019, 11:11 AM | #5 |
ninjette.org certified postwhore
Name: AKA JacRyann
Location: Mesa, AZ
Join Date: Dec 2011 Motorcycle(s): CB125T CBR250R-MC19 CBR250RR-MC22 NSR350R-MC21 VF500F CBR600RR SFV650 VFR750F R1M ST1300PA Valkyrie-F6C Posts: A lot.
MOTY - 2018, MOTM - Nov '17
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This is very popular engine for buggies and karts since Helix was produced for over 20-years. Typical big-bore kit:
http://www.scootertronics.com/cn250-big-bore-75mm.html Web Cam has performance grind for it. |
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October 19th, 2019, 05:44 PM | #6 |
ninjette.org guru
Name: J
Location: Tucson
Join Date: May 2017 Motorcycle(s): 250r Posts: 254
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It is but nobody offers the BBK it's all out of stock now. Which is why I have to make my own.
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December 24th, 2019, 02:38 AM | #7 | |
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Name: Chris
Location: Bristol, UK
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Quote:
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December 24th, 2019, 05:12 PM | #8 |
ninjette.org guru
Name: J
Location: Tucson
Join Date: May 2017 Motorcycle(s): 250r Posts: 254
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That's pretty damn close! 74.9mm piston 17mm wrist pin, but the clearance was off a little which I can work with. 23.3mm over by .8 which isn't a lot I can get a spacer or see if the shop can help me out with an alternative.
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