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Top End Time, Guru Opinions Wanted!


checkster

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OK guys, Im redoing the top end after a compression and ring leakdown test. (110 psi and 20% ring leakdown) Tore the bike apart last night and wanted some opinions. My banshee is a 97 and it looks like its never been rebuilt(got it used). Motor wise its bone stock excpet for t5's, jet kit, air filter, and .030 cut head. It ran great, but the low compression was bugging me and id rather redo it now than wait til it grenades. I was looking into what type of pistons you guys recommend and any other mods that could be done while its apart. Let me just say up front I just redid my sons kx60 motor, and I dont have alot of money right now for $500 dollar port jobs, stroking, big bores, and stuff like that. Basically I want to bore, hone and throw new pistons in it. Is there anything else I could do that wouldnt be to pricey to perk it up a bit? I mostly ride MX and trails and if I did anything to increase performance Id like it one the bottom end instead of having all top end. I have listed what I have been considering doing, let me know what you think? I know you guys know your shit, so hook me up! Is there anything else, like cleaning up the ports or anything I could do (dont want to get to radical as I dont know 2 stroke porting) maybe knife edge the intake bridge(i guess thats what its called). Basically I have always been happy with the performance of my banshee so it isnt like my skills have outgrown the performance of the bike. It will still go way faster than my pussy ass will let it go over doubles and stuff......LOL But at the same time if I can get a couple extra HP out of it while im at it why not.

 

1. new pistons (bore and hone)

maybe vitos that alter the port timing

2. ported reed cages with TDR reeds

3. advance timing

4. lighten flywheel

5. maybe a 2:1 carb if funds permit

 

sorry for the long post, but i wanted to order the stuff soon so the project isnt sitting in my garage dormant for months.

 

thanks again

checkster

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Checkster, some people will port up to your budget. Andy at grand river will ask what you want to spend and then decide what's best for the money.

 

Do you have pipes? If so advacing the timing is good. $35 ricky stator plate.

 

Get the head cut. You can get nice bottom gains from that. $25-$40. Local machine shop charged me $25 to take .030" off a couple years ago.

 

According to people on here, the flywheel lightning will allow you to rev faster. Don't know what boonman charges for the flywheel being cut.

 

Have you put a better air filter system. If not, I'd defenitley look into that. More air= more fuel. Make sure you jet accodingly $50-$90.

 

Top end kit... I'd go with wiseco for pure reliability. Sounds like that's what your looking for. Depends where you get it, but around $150 for pistons and gasket.

 

Boring, $80 for both.... if it needs it.

 

That would leave about $150 for a clean up on the ports. Sometimes, they'll include the bore in the port work. You can get mad gains from proper port work. Even more than adding pipes on a stocker.

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Checkster, some people will port up to your budget. Andy at grand river will ask what you want to spend and then decide what's best for the money.

 

Do you have pipes? If so advacing the timing is good. $35 ricky stator plate.

 

Get the head cut. You can get nice bottom gains from that. $25-$40. Local machine shop charged me $25 to take .030" off a couple years ago.

 

According to people on here, the flywheel lightning will allow you to rev faster. Don't know what boonman charges for the flywheel being cut.

 

Have you put a better air filter system. If not, I'd defenitley look into that. More air= more fuel. Make sure you jet accodingly $50-$90.

 

Top end kit... I'd go with wiseco for pure reliability. Sounds like that's what your looking for. Depends where you get it, but around $150 for pistons and gasket.

 

Boring, $80 for both.... if it needs it.

 

That would leave about $150 for a clean up on the ports. Sometimes, they'll include the bore in the port work. You can get mad gains from proper port work. Even more than adding pipes on a stocker.

I have toomey t5's, toomey air filter, cut airbox lid, and the head is already cut .030". Have to do some looking on the net for porting. Does grand river have a website?

 

check

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Talk to jim Passionre i think his standard porting is $350 with a bore job im not totaly sure about the price and he can get your pistons for $150. Give him a pm and see what he has to say, he just did my cylinder and did a great job excellent service.

 

350 port work ? not sure on the price.

150 piston kit

35 ricky stator plate

and you can use you stock carbs

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Talk to jim Passionre i think his standard porting is $350 with a bore job im not totaly sure about the price and he can get your pistons for $150. Give him a pm and see what he has to say, he just did my cylinder and did a great job excellent service.

 

350 port work ? not sure on the price.

150 piston kit

35  ricky stator plate

and you can use you stock carbs

thanks for the info guys. i appreciate it

 

check

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