V2 head on Lifan 150cc

[Weldangrind]

This is just a guess: I suspect that when they reference the Honda/Import type, they're referring to the old Honda 50/70 frame of architecture (FOE) that all of the China clones are based on. Despite the fact that our Chinese friends have bored and stroked the little horizontal motor to 150 and beyond, the FOE remains the same as a Honda 70. As an example, a China clone motor would not bolt in to a CT90 without adapters.


The Grom 125 motor has a different FOE, although it's quite similar to the clones from what I can see. That might be the reason that the Grom cam does not carry the same parts number as the 150 clone. To further complicate things, a clone that is above 150 might have yet again a different FOE to accommodate the larger proportions. In the vertical clone world, the FOE changes after 200cc; you can't bolt a 230 cylinder onto a 200 bottom end. Perhaps when they engineered the heads for your motor, they used the KLX FOE. Dunno.

[Psomniferum]

Thank you Wag. That was very informative and I appreciate it! I learned a lot. Vince got back to me from TBParts. He tells me the cam I have is the ONLY one that will work with my particular head. So I assume we can rule out the KLX cams ;-( Too bad, they have 2x or 3x bumpsticks for the Kawa's. Looks like OMB Warehouse may be a little misleading?

[Psomniferum]

This is the mount for my footrest and shifter. When the thief damaged the linkage, he tried to drill the allen bolts holding the mount to the frame. I had to drill them larger and use 2x bolts with washers and nuts from True Value. For the shifter itself, the original had a shaft to connect it to the mount, the Grom shifter does not. I picked a 3/8 x 3" bolt (I needed 2", but the 3" has the perfect shoulder to pass through the hole in the shifter and mount, the threads begin on the other side) with washers and a lock-nut. I'm using a regular nut to measure off the threads, I plan to chop about 3/4-1" off, then I'll lock it in place. Might not be the prettiest, but it's what Ace had. The Grom shifter is about 1" to 1-1/2" longer and sticks out 1" or so further than the stock unit. But my US-size 10 shoe still covers the territory comfortably, so I'm happy. I bought a 1/4" steel rod (stock is 7mm, Ace didn't carry metric) that I plan to chop and bend into place of the Grom linkage, giving me the extra 4" I need. Couldn't find the correct rod-joint bolts at Ace. If the steel rod proves impractical, I'll run to the city, to Home Depot, and try a different set up.

[Psomniferum]

The Grom vs. stock X22/125 shifter. While the stock shifter has been bent inward slightly, the new shifter would still protrude further out. I just got my TBP 5-way adjustable brake/clutch levers as well. The brake/clutch levers should be worth at least another 3 mph, they look so much more aerodynamic than the stock units!

[Psomniferum]

I was mistaken about the length I needed to extend my linkage. For some reason, I thought I was only 3-4" short. In the mock-up below I'm actually 7-8" short. I thought I purchased too much when I bought 1 foot of 1/4" rod. Now I'm relieved! The output shaft is just under the vertical blue line of paint on the flywheel cover on the upper-left side of the pic.

[Weldangrind]

I was hoping to find those adjustable levers for a drum brake, but no dice.

[franque]

If I were you, I'd cannibalize linkage parts off of a sportbike, then make it work for yours.

[Psomniferum]

Originally Posted by franque

If I were you, I'd cannibalize linkage parts off of a sportbike, then make it work for yours.

I'm ordering this set up off of EBay for $40. A little more than I wanted to spend, but looks DAMN close to the unit I'm trying to fix! Thanks for the idea, franque, I thought for sure the cbr250 would be different. Only thing that looks different is the 250 shifter has no built-in spindle like the Baodiao (Venom X22) But, by buying the whole assembly, I skip the hassle of matching the spindle up perfectly for the shifter and mount. I only hope the mount holes match up to where they need to attach to the frame. If not, I'm adapting this shifter to my current shifter-mount.

[Psomniferum]

Blindside grinding the stripped-out bungs that attach the shifter-mount to the frame. When I tried approaching from the aide, I could not clear the chain-guard. I pop the cutting disk mandrel through the hole on the backside before attaching to the drill, then pull out with the drill grinding the welded-in-place nut. Cutting WAY faster than when I had to cut through the bolts! I'm surprised they use weaker metal for the bungs compared to the mounting bolts.

[Psomniferum]

Originally Posted by Weldangrind

I was hoping to find those adjustable levers for a drum brake, but no dice.

I don't know enough about bikes to know the difference between drum handles and disk handles. I'm assuming drum brakes use different cables than disk? I plan on making the BoomCat 125 my 2nd little bike. 1st thing I want to do is switch to disk.

[franque]

Originally Posted by Weldangrind

I was hoping to find those adjustable levers for a drum brake, but no dice.

https://m.fr.aliexpress.com/item/328...List_7856903.0 that work?

[Weldangrind]

Originally Posted by franque

https://m.fr.aliexpress.com/item/328...List_7856903.0 that work?

I think that's just two different colour clutch levers, but I'm grateful for the link.

[Psomniferum]

How can you tell the difference between drum levers and disc levers?

[franque]

Drums use cables, discs use a flat piece to press on the master cylinder. Here's some other options:

https://asvinventions.com/f2-series-...ever-bdf205-k/
https://asvinventions.com/f4-series-...-lever-bdf405/

Not cheap, but amazing quality, and they're guaranteed for 2 and 4 years respectively.

[Psomniferum]

I remember pulling my jet ski out of the lake when I was a kid. As I was going over the hill to leave there is a stop light at the bottom on the other side. A car was stopped in front of me and when I applied the brakes I had no stopping power, I hit the other car. The brakes were still wet from the boat-launch and I forgot to dry them. People tell me this is why they keep drums on their trucks, they work better wet. Is this why you keep drums on your bike? Do you expose your bike to mud and water? Or is it for appearance purposes? I REALLY love the look of the new BoomCat 125cc and am planning on purchasing one. Is there a reason NOT to switch to disk, then eventually abs (after I get more comfortable wrenching on a bike)?
PS- You wrote that drums use cables. Does this mean there is no hydro-assist? They are mechanical?