Thread: My strange motor
Results 1 to 2 of 2
|
-
#1 My strange motor
- Join Date
- May 2017
- Location
- UK
- Posts
- 12
11-06-2017, 10:41 PMHere's the motor I made using 244 and 253 parts.
The head is from an AJS Regal Raptor 125 engine (DD125E) because it has bigger inlet ports than most 244 engines. I guess it's something particular to AJS because all the other 125 heads I've seen have smaller inlets. I think the 125 head on the 250 pistons makes it slightly higher compression.
The barrel is from a 253FMM that has been shortened by around 15mm to work with the shorter con rods of the 244 crank, and the pistons are YX140. I had to grind out the engine cases a little bit so the 253 barrel would fit into the Jinlun 125 bottom end. I changed the crank from a 180 to a 360 so I could use the 253FMM cam and a single PZ27 carb.
I was unable to fit a front cam chain guide so I just left it out but everything works fine.
What I end up with is somewhere around 200cc. I am currently using 428 chain with an 18t front sprocket and 28t rear sprocket on an 18" rear wheel. This seems to be about right for the gearing on this bike. I have only been using this engine for a few days but it seems to run very well.
-
#2 Re: My strange motor11-07-2017, 07:02 AM
cuz good old domestic version is a beefed-up 150 http://auto-che.com/v/dd/dd150g-281-regal-raptor.html Downsize the head to 125 spec is not economical for such small market (ie. the EU spec)
---
Welcome to the mad house!!!
so called 125
so called 150
233
YX140
Last edited by humanbeing; 06-19-2018 at 09:46 PM.
« Previous Thread | Next Thread » |
Similar Threads
-
Strange Chinese picture thread
By Supersignet in forum AsiaReplies: 125Last Post: 04-18-2015, 04:48 PM -
motorcycle starting problem( strange one !!!)
By supersmooth315 in forum MaintenanceReplies: 9Last Post: 11-08-2013, 07:36 PM -
strange stalling at idle issue.
By palisadeguy in forum MaintenanceReplies: 8Last Post: 03-25-2012, 05:14 PM -
Strange vibrations (QingQi 200gy)
By corporal_clegg in forum MaintenanceReplies: 15Last Post: 02-05-2012, 08:36 PM -
Strange clonking noise?
By lukepell18 in forum MaintenanceReplies: 0Last Post: 02-04-2012, 05:50 PM
комедии 2024 русские
04-29-2024, 07:03 AM in Off Topic Discussions