Looks good man!

 

Thanks! Hoping to make both bikes street legal this summer.

 

Got it to start tonight, and a buddy is going to loan me some better parts until I upgrade some of them so that I can set this beast's suspension up in a way where it will be competitive on the track. All that is left is to prep it for its first test ride is putting on a chain, stator cover, and securing the plastics. She sounds way nastier than I had imagined.

 

looking good buddy

 

Took it for its first ride today. It's a wheelie machine (in a bad way). Almost looped it doing a third gear roll on, looking at an extended swing arm that will allow me to keep my rear drum for now. Needs to be extended for sure though. Didn't max out the speed but did do a GPS run at 47mph before I backed off. With some snow on the road I didn't want to bail going that fast on my first ride.

All in all it's a great start to what I think will turn out being a fast bike at the track. Even with its little wheelie problem I'm gonna tack it Sunday iron practice. If it goes well ill race it, if it goes poorly, ill do the race on my SSR.

 

Note: I have an extended sdg swinger but as I mentioned above I don't have the money to dump into a disc rear setup. Considering selling the sdg...

 

I just finished a little mini motard as well. Its in the FOTM section. Nice build, keep it up. They are a blast!

 

The XR/CRF70 swingarm is 2" longer and, with a little modification, you can use the stock 50 wheel and drum brake.

HERE'S a pic of a 70 swingarm on a 50 frame.

 

Could you just change the gearing? I know on the bigger bikes changing wheelbase will make the bike harder to transition knee to knee

 

Ill check out your bike in the fotm section...

The 70 swing arm is an option ill consider, thanks for the input. Ill look at cost benefit...

 

Could you just change the gearing? I know on the bigger bikes changing wheelbase will make the bike harder to transition knee to knee

I have some different sprockets to try out, I will definitely work on gearing for different track layouts once I get familiar with the bike and how it handles. I don't want to sacrifice any more acceleration than absolutely necessary. We have a lot of very tight hairpin corners, shooting out of them as faster than the guy behind you = getting to the next corner sooner.

With a bike that is low and flick-able as the crf changing from side to side doesn't require a lot of change in body position, and all the dudes I know who have crfs swear that the longer swing arm increases their stability as well as keep from doing a wheelie out of the corners so easily. Also, raising the back end up a bit will help keep the pegs further off the ground which is crucial (as long as its not too high) because the biggest limitation for cornering where we ride is peg height. Most of us could corner harder but pegs dragging on the ground takes weight off the rear and the tire starts to hop a bit and eventually you either low side or it grabs and throws you into the wall. Ill post a picture or two tomorrow but you'll see that the rear wheel is essentially directly underneath where my butt sits on the seat.

Anyways, for my specific application, I believe the longer swing arm will be helpful.

 

In that case do you have room in the adjusters to back the rear wheel back? I don't know if it would help as much as you need but it's a cheap alternative to start

 

In that case do you have room in the adjusters to back the rear wheel back? I don't know if it would help as much as you need but it's a cheap alternative to start

Not far enough to make a real difference. It needs at least 2 inches in length and an inch. Maybe two of height.