Starting 1st build - Grubee Starfire - sprocket kit

[javelina1]

Hi group,

getting ready to launch into my HT build. Picked up a Grubee Starfire, and will be installing onto a Trek 820.

for now I plan to use the rear sprocket kit. I noticed it mentioned the 9 hole chrome sprocket is compatible with 36 spoke wheels. All I've got lying around my garage are 32 spoke wheels. will the 32 bit work?

I've also picked up some US grade studs for the head & rear mount, (and will swap those out).

I'll post picks as I start to progress.

TIA,
-Jav

 

[javelina1]

guess not... tried it on one. Can only get 8 holes to line up, the 9th is blocked by the spokes crossing over. bummer.

Was trying to keep the initial cost low, since I sold Wifey on it being a cheap hobby. $150 for the Grubee starfire kit.

Another $5-10 to replace the head & rear mount studs.

Now I need a front engine mount, (my Trek 820 downtube is huge compared to what the engine is pre-built with).

I was planning to replace the 9 hole sprocket/rag setup eventually. It's easier to piecemeal the upgrades over time, that way my budget manager, (Wifey), doesn't get to excited.

Now I got to deal with a rear wheel, or punt and maybe get an adapter. D*mn, I've got a lot of wheelsets lying around. (I have a few mountain bikes).

Need blue locktite..... Just ordered a dual pull brake, to make room for the clutch handle.... gotta get a fuel filter.... maybe a different air filter...

I don't mind though. I love to tinker on bikes and motors. I'm still happy I dove in...

-Jav

 

[MotorBicycleRacing]

for now I plan to use the rear sprocket kit. I noticed it mentioned the 9 hole chrome sprocket is compatible with 36 spoke wheels. All I've got lying around my garage are 32 spoke wheels. will the 32 bit work?

I've also picked up some US grade studs
-Jav

just use 8 bolts
like leave one off, the sky will not fall & its just [un]common sense

maybe upgrade the 8 bolts + nuts to US grade
& make the missing bolt be in the middle of one of the steel rings

seen it done all the time, even 8 Chinese bolts will get the job done

 

[javelina1]

just use 8 bolts
like leave one off, the sky will not fall & its just [un]common sense

maybe upgrade the 8 bolts + nuts to US grade
& make the missing bolt be in the middle of one of the steel rings

seen it done all the time, even 8 Chinese bolts will get the job done

or maybe a smaller diameter bolt for the 9th hole? It'll probably be the one that's needed to keep the sprocket alignment true to the drive gear....

 

[MotorBicycleRacing]

or maybe a smaller diameter bolt for the 9th hole? It'll probably be the one that's needed to keep the sprocket alignment true to the drive gear....

the original chinese kit sprockets used 5 bolts
& there were 5 slots, not holes

so maybe not

& 5 did not divide very well into 36 so we have the 9 holes today thanks to mikey da bikey if you really want to know the rest of the story

 

[azbill]

javelina, if you run into probs, email me and i will call with assistance
the 9 holes were so they divide into 36, the first kits had 5 holes which goes into the 40 spoke wheels used in china

 

[MotorBicycleRacing]

bill
how are those ez bikes selling for you?
how is yours running?
any problems?

sorry for going off topic here but it seems like it got sorted

 

[azbill]

mine is good
sales acceptable to me (I didn't get into it to get $$$, I wanted a good kit)
the mindset of company is my favorite part
any prob i have had, it has been how can we prevent that from happening again

sorry Jav...back to you dude

 

[javelina1]

no prob bro! I'm gonna figure out if I go with 36 spoke rear wheel, (via craigslist). Or I just mount up the 8 bolts, and use a smaller one for that 9th.

I'll take you up on that phone call, I'm sure!!!

 

[MotorbikeMike]

Sprocket blues

Hey Jav, for a while, I did a bunch of 68 spoke wheelsets. They were a Blue-eyed sollanovich! BUT along the way I found that if I downsized to 10/32 or 12/24 bolts, then I could have more leeway in aligning the holes.

BTW yes most were the old 5-holes (which I used to pay 8 bucks each to have the center turned to 1.5 from 1.4) but that last couple I did were 9-hole (still the math is wrong!)

Consider nice washers, good quality American hardware, and smaller bolts all around so it will still be reasonably balanced (IF that makes any difference.

Mike