- Messages
- 40
![PXL_20230122_030330240.jpg PXL_20230122_030330240.jpg](https://www.largescaleforums.com/data/attachments/82/82813-62e736558acfc0e98006ef814700dad5.jpg)
The day she arrived at her new home for 620usd delivered, needed a new front bumper, a rear hub, a carb clean, and some maintenance.
![PXL_20230122_215931194.jpg PXL_20230122_215931194.jpg](https://www.largescaleforums.com/data/attachments/82/82814-f223d3411d89c251cb10ed7a24b29960.jpg)
That didn't stop me from getting creative to take it for a test drive!
![PXL_20230126_000454314.jpg PXL_20230126_000454314.jpg](https://www.largescaleforums.com/data/attachments/82/82815-e817078654403fe6c53e207561079aa2.jpg)
Got it ripping, but needed more power and the clutch was slipping.
![PXL_20230205_020921115.jpg PXL_20230205_020921115.jpg](https://www.largescaleforums.com/data/attachments/82/82816-4f2bdc0b1f51ab4c34816d279937c392.jpg)
Oh I see, classic CY. At this point I ordered a cheap head kit off ebay, but it still ran and the head was off. So I did some mild porting which I didn't picture. Then made a base gasket out of a sheet of paper and an aluminum can coated in copper spray, paper on the crank case side al can on the cylinder side. This of course set my squish way too tight. Since I had another top end on the way I went at the piston with a flap wheel. In hindsight I should have gotten more precise and milled the piston. Because this is the top end they sent me, top stock, bottom the ebay junk.
![PXL_20230208_223238978.jpg PXL_20230208_223238978.jpg](https://www.largescaleforums.com/data/attachments/82/82817-13f797857af640ff3878c654bd33609d.jpg)
Squish on the shaved piston ended up being 0.45mm on the intake, 0.55mm transfers, and 0.65mm on the exhaust.
This mod noticeably bumped compression and performance! For a junk top end I was pleased, but still needed a pipe.
I also needed a killswitch, bigger battery, and a clutch.
![PXL_20230209_055116459.jpg PXL_20230209_055116459.jpg](https://www.largescaleforums.com/data/attachments/82/82818-54cd90de475eaa49aa18fce657a1a2f3.jpg)
Can't stuff much more in that box. Still could use a better battery, this is made from old drill 18650s 2s3p. I also installed a cheap ebay 8k clutch backwards (intentionally). This really helped my clutch response! I also needed to tune the diffs, put 500k in the center, 60k front, and 100k rear.
![PXL_20230212_055308567.jpg PXL_20230212_055308567.jpg](https://www.largescaleforums.com/data/attachments/82/82819-c1a5f44ec2ada4cf8750cdcdfc9f603e.jpg)
This is where things got interesting. I really wanted a silenced olimat, but didn't like the wait or the price. Plus I like building exhausts, had some spare pipe and time. Did some maths and metal fab, with the tube I had came up with this:
![PXL_20230212_055334568.jpg PXL_20230212_055334568.jpg](https://www.largescaleforums.com/data/attachments/82/82820-4194a16a309727d54deb7666e55ed825.jpg)
Tack welded all together ready for finish welding and work.
![PXL_20230212_055347653.jpg PXL_20230212_055347653.jpg](https://www.largescaleforums.com/data/attachments/82/82821-221a9f794934e4478e7cac9a6dfea41e.jpg)
![PXL_20230215_055039816.jpg PXL_20230215_055039816.jpg](https://www.largescaleforums.com/data/attachments/82/82822-5872d120e3bda84fdd86f8ed3d7f487d.jpg)
![PXL_20230215_055121051.jpg PXL_20230215_055121051.jpg](https://www.largescaleforums.com/data/attachments/82/82823-e9c7fd6cca63b12f39d9634955b5185c.jpg)
![PXL_20230215_055137187.jpg PXL_20230215_055137187.jpg](https://www.largescaleforums.com/data/attachments/82/82824-18e610f6236586f62abe8212be699439.jpg)
![PXL_20230215_055305757.jpg PXL_20230215_055305757.jpg](https://www.largescaleforums.com/data/attachments/82/82825-3acbc2d3568db7893d29753d8a1cdfc7.jpg)
![PXL_20230215_055345427.jpg PXL_20230215_055345427.jpg](https://www.largescaleforums.com/data/attachments/82/82826-da8599b68dcc93ec1539d55904f22d6e.jpg)
![PXL_20230215_234307598.jpg PXL_20230215_234307598.jpg](https://www.largescaleforums.com/data/attachments/82/82827-f39b27aa9e2bb0862b23e0d75b27b5ce.jpg)
![PXL_20230215_234326080.jpg PXL_20230215_234326080.jpg](https://www.largescaleforums.com/data/attachments/82/82828-c3011602bd257e640b276eff795a6437.jpg)
![PXL_20230215_234337358.jpg PXL_20230215_234337358.jpg](https://www.largescaleforums.com/data/attachments/82/82829-b4378e0c47235cfa0e587d03f1a11cf1.jpg)
Total cost: $40
Video of it in action here:
At this point in the build I was pleased, but the saggy suspension needed addressed, I busted the front bumper again, the rear cage to bumper pin as well, and the body was getting trashed. So I made a large DDM and Detroit order. But forgot new shock boots....
![PXL_20230225_063120806.jpg PXL_20230225_063120806.jpg](https://www.largescaleforums.com/data/attachments/82/82831-271041d7c8ecddc69ab7c78368fb2b0c.jpg)
One man's old dish glove is another's shock boot! 40w 13.5lb front 50w 11lb rear
Designed and printed some new parts.
![PXL_20230226_020445693.jpg PXL_20230226_020445693.jpg](https://www.largescaleforums.com/data/attachments/82/82832-3e08d6f3df58a161a972ced0db582d3f.jpg)
![PXL_20230226_020455228.jpg PXL_20230226_020455228.jpg](https://www.largescaleforums.com/data/attachments/82/82833-59d4fd6cb200478659053ab65c069d0d.jpg)
![PXL_20230226_163045461.jpg PXL_20230226_163045461.jpg](https://www.largescaleforums.com/data/attachments/82/82834-76c32d94fae4a474504e89e3fbb23a6c.jpg)
Then I waited for my Detroit order to arrive, and made a prototype center brace
![PXL_20230305_231620333.jpg PXL_20230305_231620333.jpg](https://www.largescaleforums.com/data/attachments/82/82836-c09c1db78a970fd60fdac8fac7b03387.jpg)